Sounds like it might work for you
Sounds like it might work for you
Might check this out,I found it at
www.woodweb.com Hope it gives some insight to the problem.
6/17 #6: bondo vs. epoxy w/fillers ...
Adam
Bondo is a tradename for a common automotive filler that is polyester resin and typically talc.
The Bondo name is used like Kleenex to refer to any mix of polyester filler.
Epoxy is not polyester.
Both are excellent for use as filling agents with wood.
Epoxy is an excellent glue, and when mixed with the appriorate filler materials like wood dust or microspheres is a good filler for wood.
Good polyester fillers are made by Bondo(available at pro autobody stores), NAPA, 3M, and Evercoat(marine).
They use glass microspheres as the filling agent versus talc(typ. Bondo).
At $12 a gallon it's hard to beat NAPA's MicroLight.
Minwax sells their version for big bucks and is a waste of money.
"Bondo" is also known as Architectural filler in the Woodworking Industry.
A couple of things to consider when using "Bondo"
1. Bondo will not stick to paint.
2. Do to density differences and absorbtion it helps to spot prime with BIN shellac primer when topcoating.
3. If it sticks to steel it will stick to wood.
Polyester resin sticks well enough to wood to be used as a filler. It does not adhere as well as epoxy(the perfect bond?). I is just as stable and fillers in wood do not have to be "strong"
We typically use 3 fillers in the shop.
1. Pinholes-Muralo brand Spackle
2. Nail holes-Zar waterbased woodfiller(much better than Elmers)
3. Screwholes, big gouges, missing wood,etc.-NAPA or 3M polyester filler.