ConcoursMustang Forums

Restoring - General discussions that span across many different groups of years and models => Interior & Trunk => Topic started by: OldMustangGuy on August 06, 2016, 07:18:59 PM

Title: Fastback Interior Panel Paint Removal and Restoration
Post by: OldMustangGuy on August 06, 2016, 07:18:59 PM
There are several previous threads on techniques for restoring the interior fiberglass panels on Fastbacks. I thought I'd share a couple of things that I've done that seem to work (for me anyway).

Easy Off oven cleaner (heavy duty - yellow can, etc) has been mentioned as the "go to" stripper for the interior fiberglass textured panels. I think the Easy Off approach works best if you have panels with the original paint. In my case anyway, a previous owner had painted everything with a thick coat of high gloss black enamel ...it was so thick that there was almost no visible grain in the textured panels. Per other threads and research on this and other forums, I applied Easy Off, wrapped them in plastic and let sit for a couple of days. Absolutely no effect whatsoever on the paint except that it looked really clean!

On a recommendation from a local automotive paint supply store I then tried SEM Urethane Bumper Stripper. That was the ticket...it works very fast...literally within a few minutes...and it peeled the top layer of paint off like nobody's business. I'm not sure how long a person would want to let it stay on the piece without causing damage but I limited the exposure to 15-20 minutes and then cleaned every thing off with a garden hose and scraper. Now we  were down to the original factory paint.

Back to Step 1, I then applied Easy Off, wrapped the panels in Saran wrap and let them sit for about 24 hours. That more or less did the trick...it softened up the paint enough that with water and plastic dish scrubber most of the paint then came off. There was still paint present in the nooks and crannies of the texture that wouldn't come out no matter how much elbow grease I applied.

Knowing that the remaining paint was soft and wouldn't take much to come off I decided to finish the job with my blast cabinet. I loaded it with crushed glass - size "fine" and turned the air down to about 30 psi. The remaining paint blew off quickly with no damage at all to the texture. It ended up being a multi-day project but I'm very happy with the results.

For painting, I've become a big fan of epoxy primer and use it on virtually every part of the car that has paint. It seals surfaces very nicely and is essentially bullet proof...a little expensive and more difficult to learn to paint with than other products but well worth the effort. Where its particularly nice is on the smooth fiberglass panels...when those pieces originally came from the factory they were smooth as glass but over the years of being installed they get dings, scratches, rough areas,  etc that jump right at you with fresh paint. The process I'm doing is to hit the smooth panels with a good coat of the epoxy, let it cure for a couple of days and then sand smooth with 400 grit. At that point (unless you have major defects that sand clear though and need body filler, more sanding etc) you apply the color coat (charcoal black in my case) and you end up with a beautiful result. For the textured panels, I also shoot a thin base coat of epoxy primer followed by the color. As others have mentioned, the color coat, especially the charcoal black doesn't seem to cover all that well without a dark base coat.

Not sure if this approach will work for others but, for my current project anyway, things have turned out great.

Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: J_Speegle on August 06, 2016, 07:38:02 PM
Thanks for sharing

Did you take any pictures to document and illustrate your steps and achievements?

As far as epoxy primer (or any primer at all) I'll skip that step on mine projects. Just a personal choice   :)
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: OldMustangGuy on August 06, 2016, 07:53:27 PM
I have a few pictures that I'll try to post when I get them organized.

You should come to the dark side and try the epoxy Jeff....with a mix of 25%-30% reducer it's a perfect match to semi-gloss black and impervious to brake fluid, solvents, etc.   :)
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: J_Speegle on August 06, 2016, 08:01:09 PM
I have a few pictures that I'll try to post when I get them organized.

You should come to the dark side and try the epoxy Jeff....with a mix of 25%-30% reducer it's a perfect match to semi-gloss black and impervious to brake fluid, solvents, etc.   :)

Just hate filling up any textured surface.

As far as other worries I understand there is some issues with sun exposure (why some changed from using it as engine compartment paint I understand)  and I don't carry allot of open brake fluid or solvents in the back of any of my fastbacks any more    ;D
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: OldMustangGuy on August 06, 2016, 08:59:57 PM
I hear you on the textured surface...the key (if you are going to do it) is to apply a very thin basecoat. With the epoxy primary, I actually heat it in a water bath to around 100 degrees ...that really reduces the viscosity and allows it to flow very nicely.

UV degradation has been/is an issue depending on when/where you sourced product. I buy mine from Southern Polturethanes and they started adding UV inhibitor to their black epoxy primer several years ago. Between that and the fact it would take a LOT of direct sun exposure it hasn't been a problem for me.
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: 1967 eight barrel on September 30, 2016, 07:38:40 PM
I had a similar issue. The Easy off in the yellow can didn't touch them. I even tried a stripper that was specific for fibreglass. I elected to use the low pressure plastic media method. It worked very well on the panels and the fold down seat assembly. The issue with blasting is something Jeff and I mentioned.
It removed the surface coat on the glass. The panels soaked up an immense amount of paint to get good coverage, but also left hair of the glass in the finish. It prompted me to knock the fuzz down with 600 paper and spray another light coat.
As suggested by Jeff, if you can get it off without media blasting, do it. NEVER use glass or sand.
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: midlife on September 30, 2016, 09:29:40 PM
The Easy-Off Oven Cleaner works well, but you have to buy the right version.  The Heavy Duty version and then you have to check the ingredients list to find lye.  That's the one you can use. 

https://www.amazon.com/Easy-Off-Oven-Cleaner-Heavy-Aerosol/dp/B001SJB5TW (https://www.amazon.com/Easy-Off-Oven-Cleaner-Heavy-Aerosol/dp/B001SJB5TW)
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: 1967 eight barrel on October 01, 2016, 03:18:32 AM
Randy:
Yellow can has Lye, the blue can is worthless for our use..
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: DKutz on October 01, 2016, 07:56:55 PM
The easy off didn't do a great job for me.  I ended up using an orange solvent paint stripper from Home Depot that was recommended on a forum.  That worked pretty well.
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: Bossbill on December 01, 2017, 02:24:29 PM
The yellow can of Easy Off does not currently contain lye. That's why using straight up lye doesn't work.

The ingredient list in order of ingredient percentage:
Water
Butane (propellant)
Sodium Hydroxide
Diethylene Glycol
Monobutyl Ether
Solvent
Ethanolamine
Akuminum Magnesium
Silicate
Thickener
Paraffin wax
Fragarance
Stearic acid
Carnuba Wax
Triethanolamine

This stuff is not highly popular so you can get low propellant cans. Home Depot carries it as does Amazon.

You can shorten up the time between coats by placing an infrared heater above it and covering it with plastic film. I adjust the height of the heater to give no more than 135* on the surface.

Still, this is ugly, messy, disgusting work and it still takes a lot of time. Don't get it on your shoes and walk in the house.
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: 67gtasanjose on December 01, 2017, 04:24:27 PM
The yellow can of Easy Off... Don't get it on your shoes and walk in the house.

Sounds like the voice of experience to me!
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: Bossbill on December 01, 2017, 05:13:47 PM
Uh, yeah.

It removes the finish on hardwood floors! Thankfully it was only one small dot.
And naturally my wife had to step in it with just socks on.

Looks like I "get to" spend more time in the garage.
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: Bob Gaines on December 01, 2017, 06:21:57 PM
The yellow can of Easy Off does not currently contain lye. That's why using straight up lye doesn't work.

The ingredient list in order of ingredient percentage:
Water
Butane (propellant)
Sodium Hydroxide
Diethylene Glycol
Monobutyl Ether
Solvent
Ethanolamine
Akuminum Magnesium
Silicate
Thickener
Paraffin wax
Fragarance
Stearic acid
Carnuba Wax
Triethanolamine

This stuff is not highly popular so you can get low propellant cans. Home Depot carries it as does Amazon.

You can shorten up the time between coats by placing an infrared heater above it and covering it with plastic film. I adjust the height of the heater to give no more than 135* on the surface.

Still, this is ugly, messy, disgusting work and it still takes a lot of time. Don't get it on your shoes and walk in the house.
I always had to get the "The heavy duty" easy off  because the regular duty did not contain lye. I bought some of the heavy duty about 4 months ago and it still contained lye.
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: J_Speegle on December 01, 2017, 07:02:26 PM
I always had to get the "The heavy duty" easy off  because the regular duty did not contain lye. I bought some of the heavy duty about 4 months ago and it still contained lye.

+1  Would not suggest using the "regular"  strength for this task

Available at your local grocery store, Lowes, HD and other places round here
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: Bossbill on December 01, 2017, 08:44:39 PM
No wonder I flunked chemistry 101 the first time.

Sodium Hydroxide has the common name of 'lye'.

I thought they replaced the lye with something else!
Still hate this stuff even though I just bought another can.


Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: DKutz on December 01, 2017, 10:01:58 PM
The easy off worked ok for me on the none factory paint, but didn't remove the factory stuff.  I heard about citristrip from HD.  That did the trick and didn't take as long.

https://www.homedepot.com/p/Citristrip-1-qt-Safer-Paint-and-Varnish-Stripping-Gel-QCG73801T/100208204?MERCH=REC-_-PIPHorizontal1_rr-_-203112323-_-100208204-_-N
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: Bossbill on December 02, 2017, 01:08:56 PM
Yeah, when I get pizza tonight (Pizza and a Movie Night!) I'm going to buy some Citristrip.

I could have built an engine in the time it takes to strip even one panel -- and I don't think it worked that well.
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: Bob Gaines on December 02, 2017, 04:15:00 PM
Yeah, when I get pizza tonight (Pizza and a Movie Night!) I'm going to buy some Citristrip.

I could have built an engine in the time it takes to strip even one panel -- and I don't think it worked that well.
You will have to let us know how it works out in comparison. Thanks in advance.
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: Bossbill on December 04, 2017, 10:30:54 PM
I cannot tell a Lye (yup -- humor).

The Easy-Off yellow can w/lye, although slow, took off the incorrect semi-flat black that had been layered onto a previously blue, fastback side panel. I think the PO that painted my floors black also replaced these panels. Possibly due to speaker holes?
Anyway, the lye worked but it was fairly slow. Same with removing most of the original factory blue paint. Slow, had to do it multiple times, very stinky, but it worked ok in that I'm left with mostly a stained blue panel with excellent detail.

Then today, in an area I had previously stripped of the incorrect black,  I slathered on the Citristrip and covered it with plastic; then tried without. Then with heat; then without.
Finally let it sit for 6 hrs under plastic with a constant 95+ Deg worth of heat.

The Citristrip had previously removed all traces of the non-factory paint -- quickly. But it didn't touch, soften or do anything to the factory paint.  It made it really clean, but it removed nothing.

The pics, are in order. the original area, gooped and then after. And no, the final pic is not just a re-print of the first.

No lie, I'm back to Easy Off.

Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: DKutz on December 04, 2017, 11:40:09 PM
Sorry, it worked for me...
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: Bossbill on December 05, 2017, 12:16:13 AM
That's ok!

I can use it to remove the first layer as it works much better and faster than Easy Off.
I've got enough of both products to strip all of my remaining parts.
I've read that the early cars use a different paint type/process/glass than later cars.

Bob wanted me to report back, so these are only reporting MY findings as they apply to my situation and year.
Title: Re: Fastback Interior Panel Paint Removal and Restoration
Post by: DKutz on December 05, 2017, 12:37:47 PM
the other option is a automotive stripper that is safe for bumpers.  I think you would have to get it at a paint store.