Epoxy vs. Polyester

[Cajundude 10+ year member]

Is one better than the other? I heard that the epoxy sticks better to mdf, is this true?

Is a resin, a resin, a resin, can I just buy the cheapo polyester resin from Harbor Freight and be fine? Then go over with the Rage body filler before paint? Thanks!

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[req 5,000+ posts]

polyester is fine.

 

[Cajundude 10+ year member]

Thanks! Harbor Freight it is.

 

[fo0manchu 10+ year member]

yes, use polyester. cheaper. No point in using epoxy resin for box building.

 

[Raven 10+ year member]

Bodyfill is a different story. If you're using body filler for strength (1 or even 0 layers of fiberglass) you will want a reinforced fiberglass like tigerhair or kittyhair.

 

[Cajundude 10+ year member]

I will be using body filler for smoothness and paint purposes, however, I will still put down about 7 layers just to make sure it is strong. Thanks for the replies! I went to Lowes over the weekend and picked up a gallon of the Bondo resin they sell there along with an extra tube of hardener and 9 sq. ft. of chop mat to get started. I have no idea how much fibergass I will need but figured that would be enough just to get me started.