Hey all,

I’m brand new to this forum and didn’t see this posted previously but my apologies if it has. Feel free to drop a link to thread if so.

I’m looking to apply fiber glass to cover my rear wheel wells as they’re all but completely rusted out and plan to apply flare fenders so it doesn’t need to be perfect. I mainly need a surface to apply the bolts for the flares and would like to stop the rust from continuing to eat away. Has anyone had experience doing this? I’d like to create a cardboard form but unsure how to get the curve correct bc it’s all but gone and don’t have much to go off of. Thanks in advance.

 

Fiberglass wont stop rust, may slow it down but not for very long. You can get fiberglass bondo that won't require a mold but its far from structural, so no bolting parts to it and it won't stop or slow rust either.

You'll need solid metal to mount those correctly, anything less and they will fall off in a short time.

 

There is a very good product called Ospho which, when applied over rusty metal will seal the rusty area, stop further rust, and leave a black coating ready for paint or other coatings. There are likely many other products which will do the same thing but I have had good luck with this one. Available at most hardware stores, sometimes by special order, just follow directions on the label. About the only thing you can do besides correctly replacing the damaged panels is to patch in some sheet metal to attach your fender flares or whatever to the body, either by welding or riveting. If you have a lot of metal missing, doing it that way will work, but it won't be pretty. Depends on what you are looking for I suppose.