Here's what I did to the frame on my '55 Bel Air and am about to do the same with my '69 GTO convertible frame:
I use SPI epoxy primer. No topcoat is necessary. It's a perfect finish and sheen for a frame as-is.
I used gray for the 1st coat and black for the 2nd. It makes it easier to get the 2nd coat more even that way. SPI epoxy is a semi-gloss and I think it looks really nice on a frame and suspension parts. I use it for inner fenders as well.
Frame blasting 3/4 complete:
After first coat with SPI gray epoxy:
After 2nd coat with SPI black epoxy:
Frame, springs, A-arms and calipers are all done in black SPI epoxy:
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'69 GTO Convertible - Acquired October 2020. An all original project car. Restomod is underway
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