I’ve worked in some manufacturing related spaces and have some friends who do autobody work that loaned me some space, so the research really wasn’t so much web-based.
My guess is that you could get an autobody shop to do a custom paint job with racing stripes if you wanted. I’ve used bondo on heavy dents on these before with good results, but usually the smaller dings just add to their authenticity in my opinion.
Steel Santos has some okay stuff, but I don’t like the finish on whatever their process is. I suspect they may be doing a more direct priming/paint-based approach whereas I was doing a powder coating process similar to the original they had when they were made.
Good luck, and do share your results.