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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 03-30-2005, 10:46 AM   #1 (permalink)
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My M5 body kit (front and rear bumpers) came in finally ...after 10 days of US customs impound. ghead

The result is pretty good i think, it is gray fiberglass (semi-smooth) on the outside and black smooth sealed on the inside. Obviously it is not prepped for painting yet, but i was wondering what i needed to do to prep it. Additionally, there are a few nicks in the surface. Is there an easy way to patch these.

Any help would be appreciated - THANKS!

(hopefully i will be able to attach some photos of it later....)

Regards,
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Old 03-30-2005, 10:50 AM   #2 (permalink)
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it depends on the type of primer your using. If it's a high build primer, you can sand the whole kit smooth with 180 - 220 grit and then clean it extremely well and prime it. If the nicks are small, The Bondo brand one part putty / glaze is extremely cheap and works extremely well. BE CAREFUL, though - fiberglass sands extremely fast and can wear uneven with varying pressure.
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Old 03-30-2005, 10:51 AM   #3 (permalink)
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Originally posted by sp0rky@Mar 30 2005, 10:50 AM
it depends on the type of primer your using. If it's a high build primer, you can sand the whole kit smooth with 180 - 220 grit and then clean it extremely well and prime it. If the nicks are small, The Bondo brand one part putty / glaze is extremely cheap and works extremely well. BE CAREFUL, though - fiberglass sands extremely fast and can wear uneven with varying pressure. You could even just use a 600 - 800 grit to be on the safe side and just take longer doing it. If you know what a scratch from 180grit sand paper looks like.... Any surface imperfections that size the primer will fill in nicely.


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Old 03-30-2005, 11:15 AM   #4 (permalink)
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I allways use glaze, its just so easy to fill those little nicks, rather then sanding them down and possibly digging yourself a wave. Just make shure you block it when sanding, this will keep it from looking like a crappy civic body kit with waves everywhere.

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