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Old 05-11-2011, 09:29 AM
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Default How to prep fibegrlass for paint?

Did these 2 yesterday for my tweeters.
First secured it with plumber's putty so i don't have to worry about tweeter pod moving a bit and then fiberglass to secure it all the + make it seem like one solid piece.

What do i use on top of fiberglass that would be easy to apply and sand?
Areas are small and "curve-y" all around





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Old 05-11-2011, 09:33 AM
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you can either use a mixture of resin and body filler or just body filler depending on how confident you are of the strength of the resin you have now. for paint you'll need to make sure the surface is as smooth as possible. probably use 120 grit than 200 grit than maybe 400 or 800 grit.
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Old 05-11-2011, 09:54 AM
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There's really not much of a need for (more) strenght in this case so body filler will do.
Now u're talking about any brand/make/model filler they sell in every AutoZone, Home Depot, Lowes....?
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Old 05-11-2011, 11:01 AM
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i personally use 3m products. the lightweight 3m body filler is ~$20-24/gallon and i've found that it's about as good as Rage Gold. the big difference being price, I can't get Rage Gold for less than $40+/gallon. I just can't justify the difference of $15 as they are about the same to work with. the Rage does same a bit easier and does bond a bit better. try a paint supply store.
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Old 05-11-2011, 11:56 AM
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i have used the Bondo brand as well as the Evercoat Rage Gold. The Rage Gold was alot easier to work with but its a good bit more expensive. i can get it for 35 a gallon but your not gonna need a complete gallon for those. a quart will do.
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Old 05-11-2011, 12:27 PM
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ever coat rage extreem or regular rage

you will never use bondo again after you use it
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Old 05-11-2011, 12:41 PM
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Duraglas is nice filler also.
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Old 05-11-2011, 12:56 PM
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evercoat FTW. And what did you do to help the glass stick to the plastic? Looks like you just layed up on top.
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Old 05-11-2011, 01:12 PM
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Sanded it with the biggest grid i had (don't know the number but that thing was more then enought lol, it was more like cutting that plastic rather then sanding lol) and cleaned it with acetone.

Last edited by Vital; 05-11-2011 at 01:22 PM.
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Old 05-11-2011, 01:22 PM
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I have done it that way myself. It may or may not hold. You really need to use a plastic bonder to get it to stick for sure. But that stuff is expensive. Not to mention you need a special gun to do it with.

I would just lay a thin coat of filler and knock it down with 36grit. Then sand it out with 80-120 to get the scratchs out. Then a couple coats or high build and more sanding. After that primer sealer and a coat of paint. Wet sand up to 500. Then 8-10 coats of clear. Wet sand that to 2000 and buff.
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