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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 01-28-10, 09:15 PM   #1
Encore
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Can I spray a clear/flake coat over powdercoating?

I've been searching the forum (and others) for a while now, and found little bits of info about lug-lining over a powdercoat, and sanding then masking for a rattle-can paintjob. So I thought I'd post and see if anyone had any experience with what I would like to do.

So, essentially I have a late 70's conversion, with a lugged steel frame. I bought the frame sight-unseen over the net, for a great price, but it came with a really sub-par powdercoating job. Super flat looking, slightly bumpy in places. I would rather avoid the cost (here in NZ I am looking at around $300 for sandblasting and repainting) of changing the colour, and instead thought I might just pick up some rattle-cans of clear, with the silver flake in them, and spray the whole frame. Build it up with a whole bunch of thin pure clear coats on top for visual depth.

My questions are as follows:

1: Should I sand the powdercoat beforehand, or would that just make the non-glossy problem worse?

2: Any advice as to which paint would be best for this sort of thing? I am guessing automotive.

3: Any tips on the process of getting the first few coats to stick would be greatly appreciated.

Cheers!
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Old 01-28-10, 10:34 PM   #2
kato7997
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Yes, sand the powdercoat beforehand...clear coat needs a good surface to adhere to.

I would probably wetsand wth 600 grit until smooth, be careful not to go through the color (uh colour). The clear coat will fill the 600 scratches np.
Wipe clean with solvent.
1 light coat of clear first. Followed by 2+ medium coats. 5-10 minutes in between coats. The more the better...

The trick is to lay it on as thick as you can without running it. If you're top notch (uh tits)...you won't need to wet sand. Practice on something lying around first. More than likely, you won't lay it down perfectly and you'll have runs/sags/overspray...etc...this means you are going to have to wait for the clear to CURE (not just dry) and then wetsand and polish...
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Old 01-29-10, 02:45 AM   #3
BoozyMcliverRot
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Just for your info,I did a flat black base coat on my Bianchi Boron XL with a Duplolor clear coat on top and it looked awsome.

here is a pic of it flat black



and here is a pic with the clear coat



BY the way,here is a link to the paint company..


http://duplicolor.com/products/effex.html
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Old 01-29-10, 09:10 AM   #4
ichitz
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man the flat black is hot..
reminds me of the guy who painted his bike with "chalkboard" paint (or whatever it's called) I want one
http://velospace.org/forums/discussi...ng-chalkboard/
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Old 01-29-10, 03:51 PM   #5
Encore
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Thanks for all the help!

I've got some new forks coming (moving from threaded to threadless) so I'll have a crack at the painting when the bike's being pulled apart for that.
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