andrew-theasby
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| posted on 30/12/06 at 11:10 PM |
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Powder coat or paint?
Hi, after reading the recent post about powder coating i started wondering about what to do with my chassis, its currently powder coated blue, but its
crap. Ive also done a fair bit of welding on it so want it re doing. I can either blast and powder coat it, or blast if necessary then spray with
epoxy 2 pack etching primer, then epoxy 2 pack top coat. Which would be best? I already have plenty of the paint, so that wouldnt cost anyting.
Also can the powder coating thats currently on be removed with nitro moors or something like that to make the blasting easier? Thanks
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froggy
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| posted on 30/12/06 at 11:18 PM |
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some threads on this already but i have a set of gates which i had blasted etch primed and painted in 2k still no rust 5 years on
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RazMan
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| posted on 30/12/06 at 11:24 PM |
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I would say that the most resilient finish would be powder coat but not by much. If you already have the paint and are willing to put the time in,
then obviously you will save yourself quite a bit of dosh by painting it yourself.
Removing old powder coat is a bugger though - 'the tool' is about the only thing to touch it unless you get it sand (or other media)
blasted
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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zetec7
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| posted on 31/12/06 at 12:24 AM |
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I was originally going to powder coat, but it occurred to me that the car will never, in all liklihood, be absolutely finished - I'll probably
be welding tabs on here and there, etc., for years. The paint can be sanded down and touched up...the powder coat can't. I talked to my
specialist, who does both, and he recommended the epoxy paint....
http://www.freewebs.com/zetec7/
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andrew-theasby
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| posted on 31/12/06 at 12:43 AM |
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Hmm not very positive thinking, but very true! Looks like ill be needing a dust mask or two for the tool too. Thanks
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kb58
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| posted on 31/12/06 at 12:58 AM |
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quote:
Originally posted by zetec7
I'll probably be welding tabs on here and there, etc., for years. The paint can be sanded down and touched up...the powder coat can't.
Epoxy powdercoat is good for everything except UV exposure. About the paint not being able to be touched up, sure it can. Grind off where needed, do
the welding, then spray paint with a matching color. Its still better than spraying the entire car.
Mid-engine Locost - http://www.midlana.com
And the book - http://www.lulu.com/shop/kurt-bilinski/midlana/paperback/product-21330662.html
Kimini - a tube-frame, carbon shell, Honda Prelude VTEC mid-engine Mini: http://www.kimini.com
And its book -
http://www.lulu.com/shop/kurt-bilinski/kimini-how-to-design-and-build-a-mid-engine-sports-car-from-scratch/paperback/product-4858803.html
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PAUL FISHER
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| posted on 31/12/06 at 01:24 AM |
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I am not sure if you realy need to remove the old powder coat before you re powder coat it,I had a engine frame repaired,and welded up again,which had
been powder coated,it was re powder coated without having to strip it,it looked spot on when I got it back.
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stevebubs
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| posted on 31/12/06 at 03:28 PM |
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10 years on and my powdercoated chassi still has no rust...
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caber
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| posted on 31/12/06 at 11:24 PM |
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. . . . . .That you can see! Unfortunately powder coat can hide corrosion very effectively!
I decided to paint mine and I am glad I did! I waited until I thought all welding was done and decided on a significan number of things that would be
bolted rather than welded however I am still having to cut off brackets and weld on new ones much easier to fix with paint!
Caber 
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kb58
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| posted on 1/1/07 at 01:17 AM |
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quote:
Originally posted by caber
... however I am still having to cut off brackets and weld on new ones much easier to fix with paint!
I guess I don't understand how powdercoat is harder to paint. You grind off the old powdercoat, just like you'd do with sprayed-on paint;
you do your welding, then you spray it with a can of matching spray-paint... I don't see the difference.
Mid-engine Locost - http://www.midlana.com
And the book - http://www.lulu.com/shop/kurt-bilinski/midlana/paperback/product-21330662.html
Kimini - a tube-frame, carbon shell, Honda Prelude VTEC mid-engine Mini: http://www.kimini.com
And its book -
http://www.lulu.com/shop/kurt-bilinski/kimini-how-to-design-and-build-a-mid-engine-sports-car-from-scratch/paperback/product-4858803.html
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stevebubs
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| posted on 1/1/07 at 01:59 AM |
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quote:
Originally posted by caber
. . . . . .That you can see! Unfortunately powder coat can hide corrosion very effectively!
Fair enough comment ... areas where I would have expected to have perhaps rotted (rear floor - steel with holes for mounts - real water-trap if caught
in the rain) were still perfect. How do I know? Spilt some acetone there and it stripped the powdercoat off 
OTOH, I would expect powdercoat to bubble like paint if the orange worm gets hold...
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