Stop using Bondo to fill inner wheel wells - it traps moisture and rots from the inside

I saw 3 cars come through my shop last month with that exact problem. Customer said another shop did it 6 months ago. When I cut into it, the rust was 4 times worse than before because the Bondo held water against the metal. Use a seam sealer or weld in a patch panel instead. Has anyone else seen this happen on older trucks especially?

2 comments

2 Comments

gavin_allen4819d ago

Done it plenty of times on my own trucks and never had a problem. Maybe the guys doing the prep work just aren't cleaning the metal right or sealing the edges. If you feather it out proper and use a decent bonding agent, it's fine. You ever try it on a dry climate truck or just salty road beaters?

abbyk1019d ago

Friend of mine tried it on his Tacoma out in Arizona, no rust issues at all. Held up for three years before he sold it, still looked solid.