woodywoods12345
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Registered: 24th Oct 05
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How do i achieve the best result with fibreglass and p38? I know ive got to sand loads, but what else? Also what grade does the sand paper go up in? what the roughest etc? Thanks
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Tommy L
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Registered: 21st Aug 06
Location: Northampton Drives: Audi wagon
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depends on what you are doing?
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woodywoods12345
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Registered: 24th Oct 05
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a tv build, Ive already done but im unhappy with the outcome and have decided to get a better result.
[Edited on 03-12-2006 by woodywoods12345]
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Tommy L
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Registered: 21st Aug 06
Location: Northampton Drives: Audi wagon
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applying p40 generously is the key but not too much. get a high grain sandpaper (rough) and sand it down to the shape you want. then maybe use a lower grain sandpaper to smooth it a bit more but so its not too smooth and a little rough so the p38 can grip to it. do the same with p38 but at the end use the lowest (finest) grade sandpaper you can get hold of and rub til smooth. also get some filler primer so it gets rid of all tiny pit marks that you may have,
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Crazy LEDs
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Registered: 14th Sep 06
Location: County Durham
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can you not just shape it more and fill it then sand
looks too good to have to start from scratch
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woodywoods12345
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Registered: 24th Oct 05
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no im not startin from scratch, theres just a few things i need to top up, like the headunit wont fit in properly on the one side because the single din is at a slant etc
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RichR
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Registered: 17th Oct 01
Location: Waterhouses, Staffordshire
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you talking about fibreglass matt and resin or the pink shit in a can P40? cause you wont egt "best results" with the latter
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woodywoods12345
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Registered: 24th Oct 05
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im talking about p38 and p40 the one you get from halfords for 9.99
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RichR
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Registered: 17th Oct 01
Location: Waterhouses, Staffordshire
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thats not really fibreglass - it is generically but not really - its a bridging agent; it's incredibly heavy for what it is as well
Your much better off shaping the gaps with foam and then using a small amount of glass matt
then if you need to and you shouldn't; use a small amount of filler and sand it back until smooth
thats how I'd do it anyway; would never crack either and you can remove the foam after the resin has cured - its only there to support the shap for cure
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woodywoods12345
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Registered: 24th Oct 05
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yeah i no, but stickin to the basics is alot easier, this is the only fibreglass ive ever used, n it took me ages to get to grips with it, thanks tho, will bare it in mind for when i make door pods
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RichR
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Registered: 17th Oct 01
Location: Waterhouses, Staffordshire
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thats the problem though - everyone thinks its the easy route but its actually more difficult as its near impossible to sand down because of it's fine mesh characteristics
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drax
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Registered: 5th Feb 05
Location: Sittingbourne, Kent
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Use alumium oxide paper to sand it down flat and shape it. but reduce to wet and dry to make sure you dont end up with grooves.
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RichR
Premium Member
Registered: 17th Oct 01
Location: Waterhouses, Staffordshire
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or use an orbital sander and detail sander -take the effort level out
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