My go to is Blast, wipe with Laqure Thinner. Then DX570 if small pits!
Once metal is ready, follow up clean with PPG DX330 Wax_Grease {acryi-clean} before the Epoxy.
If filling is needed Poly Based Sandable primer like Evercoat Slick Sand. Sand to #400. Then Paint / Clear.

[img]https://i234.photobucket.com/albums/ee87/fast340six/sig%20pics/2840886-340SIX-1.jpg[/img]
VP of the MPM in New Orleans
73 Dart Sport 340/ 70 challenger vert. That may still get built, If I live long enough