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Post by Deleted on Sept 18, 2007 17:06:28 GMT
Hi, will any body filler be suitable for use on fiberglass or is a special mix required?
Pete
(Still Grafting)
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Post by chrisbailey on Sept 18, 2007 19:34:06 GMT
I have been using p38, I havent seen a special bodyfiller for fibreglass, so i expect, body filler should be all the same. Some bodyfillers actualy contain fibreglass, to bridge gaps etc. But there are special techniques to apply bodyfiller to fibreglass. If you are filling over a painted body, the paint should be removed first, else it will release the filler. The surrounding gellcoat should be sanded smooth around the area to be filled, if you try and fill an area without sanding the surrounding area flat, like trying to fill a crater, you will find the filler will just fall out, and cracks around the joins will appear.
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Post by Deleted on Sept 18, 2007 21:50:05 GMT
Use P40 (glassfibre mix) for cracks and P38 for smoothing. If you have any cracks or holes fill them from the seen side not from behind. Any stress cracks need to be ground back to the gelcoat or further otherwise when you do a final paint eventually the cracks will start to appear again, (primer is usually ok it appears mainly after the top coat) may take sometime but they will return. On subject of painting there are some special primers for glass cars but you will need to do a bit of research for the right stuff as I don't have the info to hand.
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Post by chrisbailey on Sept 19, 2007 6:53:27 GMT
i was told by a paint specialist, you need a etch primer, then a build primer (2k or cellullose), and finaly a top coat (2k or cellulose).
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Post by Deleted on Sept 19, 2007 7:26:52 GMT
Sounds about right, although it is getting very difficult to get cellulose paints in any quantity and 2K will soon be going the same way, not yet but sometime in the future. I am using just a 2K high build primer no etching primer, it's what I had at the time and so long as I have prepared the body well enough will be fine and shouldn't peel off. hopefully
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Post by Deleted on Sept 19, 2007 11:07:26 GMT
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Post by Gary on Sept 19, 2007 19:47:36 GMT
Hi, will any body filler be suitable for use on fiberglass or is a special mix required It depends on what you are filling and the quality of job you want. The best way to fill gelcoat is with resin etc anything else will crack out eventually
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Post by chrisbailey on Sept 20, 2007 10:21:42 GMT
I didnt know you could use resin as a filler, I will try it, would be cheaper that way, what is it like to paint on though, does it hold the paint, it looks abit too smooth and shiny.
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Post by Deleted on Sept 20, 2007 19:53:03 GMT
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