So Jeff, are you saying #9423 can be hood paint and engine compartment paint? Which of the 2 hood paints looked the best and which one can get the flatter sheen?
Not what I meant to say at all. Thought we were comparing hood paint but your questions have sort of mixed the two (engine compartment and hood) in the same discussions
"At this stage of the game shouldn't there be a part number for "concourse correct" engine compartment paint......and while on the subject, black out hood paint for '69 Mach 1's. "
So at this stage in the game there are part numbers for paint but the are different due to what is legal and available in your area/region. Add to this the painters preference and experience in certain products. Due to this you get different recommendations depending on who you ask.
On my last 69 we used #9423 for the exterior black outs like originally done and Hot Rod Black since it was legal to shoot in my area and what the painter had experience (had seen the finished look on many of the cars done there) in using
Others will have other suggestions especially if they are not located in the US