If you mean by "natural" you mean unpainted then yes
Many will have a different look based on the fact that they are different metals and formed/made differently so they will not all look the same
Most owner/builders will plate, coat, treat, die the parts to reproduce the original look of each part. Then on parts like spindles you have multiple finishes since areas are just cast and quenched but others were machined after they were formed.
- Spindles - Mixture of dark oil quenched cast iron with a coating of a darker layer depending on how dirty/used the quenching oil was at the time with freshly machined surfaces as specific locations
- Front shock absorbers top mounting bracket - Formed sheet metal brackets attached to the top of the shock towers in the engine compartment. Looking at original cars typically we find semi-gloss black. So since you lack (at least it sounds that way) any evidence otherwise go with typical and normal production practices would be suggested
- Leaf spring shackles- Fresh formed metal with darkened studs/shafts
- Rear shock plates - Thick formed metal plates. Basically fresh metal look. Slightly shinier along bends
- Sway bar brackets - Fresh formed steel
- Strut rods - Oil quenched steel normally not as dark as the spindles and without the quench oil layer/coat
Understand that with the update/patch search may not be currently working
There is an article in the Library covering the basics/overview of naturally finished suspension parts
On of a number of prior threads is one for the spindles
https://www.concoursmustang.com/forum/index.php?topic=473.msg34868#msg34868
