Bondo Filler prep

Question

Bondo Filler prep

muffinator_777 (Mechanical)

(OP)

23 Oct 23 17:25

Hey,
I am considering using Bondo filler for my composite work for the first time and I was wondering if I would absolutely need to apply gelcoat over it. I was wondering if I could just sand it and then apply mold release wax and PVA mold release to it. In my head since it's a polyester resin it should be fine. I would be using the one that doesn't contain fiberglass. Thanks!

btrueblood (Mechanical) · Answer 1 · 2023-10-23 17:34:40

You will probably see a need to re-coat the bondo area with mold release more often.

muffinator_777 (Mechanical) · Answer 2 · 2023-10-23 17:53:02

Ah okay. But it'll work?

The mould isn't meant to be super reusable. It's for a 3d printed mould that just has a defect from the actual printing process.

btrueblood (Mechanical) · Answer 3 · 2023-10-24 14:49:02

Yes I've seen it work...but the same shop always gel coated their production molds.

muffinator_777 (Mechanical) · Answer 4 · 2023-10-24 15:55:33

Sounds good. I already decided to just go through with gel coating anyways. Thanks!

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Bondo Filler prep