Fiberglass Mat & Bondo, vs Welded Patches [Archive] - Chevelle Tech

: Fiberglass Mat & Bondo, vs Welded Patches


hd99fxst
Nov 12th, 01, 7:40 AM
Hi all,
I have a 1971 Chevelle Malibu (4 door), which is my daily driver. Inattention to the front fender drains caused rot behind the front wheels; leaking trunk seal contributed to rot around the rear wheel wells. This is a daily driver, not a show car. I'd like to make it decent, without spending a fortune. And, I have ZERO experience welding.

If the rust is thoroughly cut away, and everything is sealed well with an epoxy primer when I'm done, can I make a decent repair to these areas with fiberglass mat and bondo? (My Chilton body book says it's OK, but I'm not sure whether to trust them!) Would I only be kidding myself, and see the evil rust monster return in a matter of months?

If welding patches is definitely the way to go, can you point me to the right equipment and info on technique? (Since I bought the BIG compressor,I already have a 20-Amp 220V outlet available in my garage.)

Much appreciated,
mark.

FO_FDYFO
Nov 12th, 01, 8:42 AM
the correct way to do it, is patch panel. at least thats what everyone would say. thats what anyone buying it would want too. it really depends on you. the patch will last longer but if you can brace the fiber glass and get it to bond mechanicaly (through holes or some kind of locking feature) it should last many many years if you remove all of the rust and paint it well. good luck

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MalibuDreamer
Nov 12th, 01, 10:07 AM
WELD

if you ever try to go back and fix the fiberglass patches you put on (if you do that is) you will kick yourself and say "why the he!! did i do that."

Plus it raises the value of your car, instead of making it an eyesore for a qualified buyer.

Jimmy P
Nov 12th, 01, 10:28 AM
Another alternative to welding is FUSAR or #-M's panel bonding 'glue'. It's a two-part adhesive meant for assembling metal parts together. Perfectly acceptable and WAY better than fiberglass junk. You'll still have to use plactic filler to smooth the surface, but you'd have to anyway even if you welded in a panel. Go to an Auto-body supply store and ASK QUESTIONS. They'll give you the right stuff.