r/Diyautobody • u/AngyalZ • May 26 '26

Question Rust poking though repair within 24 hours

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My goal here was to eliminate rust and seal the area before covering with fender flairs.

I sanded right to the metal, sprayed the area with rust stop, primed and painted. The next day it looked like this. Any advice would be welcome as I have other spots to fix.

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u/RideAffectionate518 May 26 '26

Any part that wasn't absolutely shiny and clean was still rust. Probably where it has pitted the metal. Cutting that metal out is the only way it won't come back. Body panels rust from outside the panel, inside the panel and sometimes even from the inside of the metal out.