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 Post subject: new paint job
PostPosted: Mon May 18, 2020 8:56 am 
Newbie

Joined: Mon May 18, 2020 8:46 am
Posts: 2
Hi there,

I am slowly getting into refurbishing my old road bike. I believe it is from 90s. So far I have had it stripped down entirely and the frame has been blasted and primed. The frame is steel frame. I am hoping to use one of the Halfords metalic car paints with clear coat on top.

However, I see a lot of people seem to tape off all the bottom bracket opening, seat post opening, etc. before painting.

Why would I want to tape off anything? As said the frame has been nicely blasted and primed as it is all steel, bare frame.

Thanks


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 Post subject: Re: new paint job
PostPosted: Mon May 18, 2020 9:21 am 
Old School Grand Master
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Joined: Thu Jul 19, 2007 7:18 pm
Posts: 3830
Location: Staffordshire
You don't want paint in the threads. It will be a pain when you rebuild the bike and could act as a sort of DIY thread lock.

Either mask it off or use an old scrap BB. Mask off any areas where fit is critical like headset cups and don't forget to stuff the seat tube with some tissue or something. Runs can be a pest.


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 Post subject: Re: new paint job
PostPosted: Mon May 18, 2020 9:25 am 
Two Fat Ladies

Joined: Wed Feb 05, 2020 3:04 pm
Posts: 88
I put grease on these areas and then clean the surface that I want paint to adhere to. Once it’s painted, clean the threads and Head tube with a cloth.


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 Post subject: Re: new paint job
PostPosted: Mon May 25, 2020 1:35 pm 
Newbie

Joined: Mon May 18, 2020 8:46 am
Posts: 2
Thanks both! All is now prepared for a base coat. As said, I am intending to put a clear coat on top. Before doing so, do I necessarily have to sand the base coat with a fine grit sanding paper?
Obviously I am trying to save some work in here. What's the risk of spraying clear coat directly on base coat (like 24h after painting?).


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 Post subject: Re: new paint job
PostPosted: Mon May 25, 2020 1:55 pm 
Retro Guru
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Joined: Sun Jun 28, 2015 9:54 pm
Posts: 869
gregd72002 wrote:
Thanks both! All is now prepared for a base coat. As said, I am intending to put a clear coat on top. Before doing so, do I necessarily have to sand the base coat with a fine grit sanding paper?
Obviously I am trying to save some work in here. What's the risk of spraying clear coat directly on base coat (like 24h after painting?).



generally, you wouldn't sand a metallic base beofe clear unless its patchy, blotchy ... in that case you would lay a mist coat.
ideally, spary your clear within 20 mins of applying the base.


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