Bondo long strand?

[StckweldinSteve]

I'm going to get hate for this I know....I'm a welder by trade and I already have sheet metal and a mig setup at my house but having never done auto body work....this self adhesive steel patch and long strand fiberglass bondo looks ridiculously easy to patch holes with if you bare metal and cut out all the bad. Anyone used this technique or is it blasphemy?

 

[Darter6]

Used something called Tiger Hair on a fleet of rusty Mack trucks back east. Fiberglass strand filler.
Held up well. Had to patch up to pass state inspection.

 

[PROSTOCKTOM]

Tiger Hair is a product produced by Evercoat, and is a very high quality, expensive product that I've used many times.

It's waterproof unlike regular Bondo type body filler so it works really well if you put a little tooth (scratching) the metal so it has something to grab to.

A little lite scuffing with some 36 to 40 grit sandpaper works perfect for excellent adhesion.

Once you get the fiber strand (Tiger Hair) smoothed out by rough sanding (36-40 grit) you can skim it over with body filler, sand, prime, paint.

As far as body filler I am a 100% advocate of using Evercoat Rage Gold. It too, is not cheap, but it is superior quality and the choice of high end builders.

Time, Patience, and Quality Materials make all the difference to the end result. However, I have seen quarter panels built from paper grocery sacks and fiber strand sanded and painted.

It's not all that hard to do body work, but it will sure make a nice shop turned into a trashy shop from all the mess.

The dust will get into everything, so beware before you start.

Tom

 

[RR Fan Dan]

I’m using this on my 74 restoration.

 

[RemCharger]

Mar- glass was pretty good

 

[Photon440]

Almost all commercial body fillers use polyester resin mixed with a filler like talc or calcium carbonate. The better ones that are waterproof can include aluminum powder or glass - either in strand form, microspheres or as fumed silica, known as Cabosil.

But if you want to make your own superior blend, take that glass filler and mix it with epoxy resin instead of the polyester. It bonds far, far stronger, has less shrinkage and a lot less odor. Bladecutter had some tutorials on it here:
Filler Secrets 101

 

[eldubb440]

back it up with some news paper......and a few paint sticks