tegwin
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| posted on 21/5/09 at 08:00 AM |
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Tin-Top Panel rust?
I made the rash buy last night of a 2003 VW transporter which eventually I want to convert into a camper type thing...
Its a 2.5TDI which has been remaped to 140hp... it SHIFTS!!!
Anyway, there is a little bit of surface rust in the usual places... inner front wing arch lip where the water flicks up on it and a few bits and
pieces else where... It all looks cosmetic to me and I should be able to sand back more or less to clean metal....
However, once I am back at clean metal what would be the best product to put on the metal to stop it rusting up again quickly?
I could just use Halfords primer/topcoat/laquere... but wonder if there is some under-primer that can be used to treat the metal first?
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Mr Whippy
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| posted on 21/5/09 at 09:49 AM |
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you not under sealing it then? that’s what I use inside the arches and underneath. Thin it down till it’s like paint with white sprit and give it a
few coats after each dry. You get folk who claim it actual promotes rust and they prefer paint so the can see any problems occurring but tbh their
just talking b$ll$cks
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tegwin
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| posted on 21/5/09 at 09:57 AM |
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Hadnt thought about undersealing it... that would be a good idea.....
I assume underseal is just a normal paint product that can be painted on with no issues? How long does it take to dry? I guess its going to want a
thorough clean underneath first?
Its the bits of the bodywork that are on show IE not under the car that I was unsure about... I guess I cant use underseal on the body and paint over
it... it would show?
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Would the last person who leaves the country please switch off the lights and close the door!
www.verticalhorizonsmedia.tv
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MikeRJ
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| posted on 21/5/09 at 10:02 AM |
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The problem with traditional bitumen underseal IME is that it tends to dry out and crack and start parting company with the metal as it gets older.
This creates voids where water can get trapped.
Epoxy Mastic is good stuff, though not cheap. The Bilt Hamber cavity wax is also superior to Waxoyl
for sills etc.
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jimgiblett
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| posted on 21/5/09 at 11:14 AM |
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I was recommended POR15 and then underseal. Not sure weather you can paint over POR15.
Interested in comments from others as Ihave the underside of my 67 Alfa to sort.
- Jim
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Mr Whippy
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| posted on 21/5/09 at 11:17 AM |
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the white sprit will prolong the underseal and prevent it drying out, I have stuff on cars that’s over 15 years old I put on back then and its still
in perfect condition.
Voids often start because folk have applied it over a damp surface (easily done in a damp garage), you should always heat up the metal till its hot to
touch with your hand before applying using either a good hairdryer or a heatgun.
You can buy cans of stone chip paint that goes rock hard and can then be over painted in body colour. Most manufactures use this even on new luxury
cars so it doesn't look odd.
my bluebird undersealing exploits...
linky
linky2
[Edited on 21/5/09 by Mr Whippy]
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