I know how to fiberglass so thats not what this post is about, I recently fiberglassed my dash. I drilled a lot of holes so the mat would have somthing to hold on to. I wanted to know if it would be nessesary to fiberglass both sides of the dash? Will it come apart if not done? I also read a couple people post(On another post of mine) that they would just lay down body filler and sand that instead of sanding down the fiberglass. Would this be good? For some rearson when I think of body filler I think of it breaking easily. any advice would be great.

the reason behind drilling the holes is kind of like putting a bolt through something. you add some fiberglass on the other side to act as a washer and nut would on that bolt. that way it helps hold better.

as far as putting body filler on, get the fiberglass fairly smooth, then add the body filler over that to fill in pinholes and even out low/high areas. the body filler shouldn't be thick at all, like 1/8th inch at the most. but it shouldn't break, since it sticks to fiberglass really well.

cannon fodder wrote:the reason behind drilling the holes is kind of like putting a bolt through something. you add some fiberglass on the other side to act as a washer and nut would on that bolt. that way it helps hold better.

as far as putting body filler on, get the fiberglass fairly smooth, then add the body filler over that to fill in pinholes and even out low/high areas. the body filler shouldn't be thick at all, like 1/8th inch at the most. but it shouldn't break, since it sticks to fiberglass really well.

This is my Sig.... its wonderful isn't it...

wether i put the cloth on the backside all depends on how big the piece is, for something like a dash, i'd definatly put a strip of cloth on the backsie over the holes jsut because the piece is so big. the bolt nut example is a good analogy

sand the fiberglass so any big chunks or raised pieces are smooth, then cover the entire piece with filler and sand it to shape. if your going over 1/8" yove got some fiberglass issues.use the filler will save you hours of time because fiberglass is a pain to sand. this is how all the top audio guys do it when their building cars. if u want a decent look at how its done, go to alpines website and look at the demo cars.


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