front fender top rust, pulled rubber material out?

weldedcambolt

TJ Enthusiast
Supporting Member
Joined
Mar 15, 2018
Messages
472
Location
ohio
My front fender has a rust spot, got into it, an found some rubber like stuff in the hole. Its right at the top of the fender in the front, right after it bends down in the front. did oem fenders have some kind of rubber material between the two pieces of sheet metal? or maybe they filled it before with something?
 
is that why they are rusting out?

Rust on the fendets is a common issue with our Jeeps due to trapped moisture and or salt between the 2 layers. There are really only 2 cures that require either cutting and welding in a patch or total replacement. I replaced one of mine. Removing the rust and using a filler material tends to only last a short time .