After sandblasting the firewall, I welded up 30 various sized holes and wire feed-thru openings. That was the good news. The bad news was, 4 tapped holes that I welded closed were the mounting holes for the battery tray. Soooooooo, I had to drill them out and tap them.



After wiping down the firewall with wax & grease remover, I laid down 2 coats of epoxy primer, and then sprayed 3 coats of high build primer.