I have an XK 140 chassis that I have stripped of all parts and will be having it media blasted soon. I want to coat it with something soon after so it doesn’t flash rust, (Maine weather) It seems like, judging from the archives, many folks are happy with DP90 epoxy paint. My question is what do folks recommend for filing the rust pits? Also should that product be put on before or after the DP90. My thought is to blast it, then prime it, fill it, fix the rust holes then put a final coat of whatever black finish paint. Anyone have an opinion. It is appreciated.