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Old 06-17-2013, 10:29 PM   #1
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Paint or Plasti-dip on penthouse bolts? Bad idea?

Just got a new SMB built from SMB Texas this May. I'm feeling the need to cover the top penthouse bolts and washers with something to prevent them from rusting. I've got a pint of glossy black rustoleum and I also have a rattle can of Plasti-dip.

Is either of these a bad idea? I imagine the rustoleum could make removing the bolt tougher.
The plasti-dip can be peeled off easily, but then I worry that it might actually make things worse if water can get under it and be trapped again the metal.

Anyone have input?

Thanks,
Mike
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Old 06-18-2013, 07:58 AM   #2
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Re: Paint or Plasti-dip on penthouse bolts? Bad idea?

The top penthouse bolts should have plastic caps. Are you talking about instead of, or under the caps or what?

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Old 06-18-2013, 08:33 AM   #3
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Re: Paint or Plasti-dip on penthouse bolts? Bad idea?

I'm not sure you need to do anything. In 9 years mine have not rusted or corroded in the SF Bay area and all the places we have traveled.

If your top is painted, wax the top and the bolts a couple of times a year. If your top is gelcoated, use a marine sealant 1-2 times a year. If you have the textured top, use what you are comfortable with. I would caution you not to block the channel and cause water to pool more by the bolts.

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Old 06-18-2013, 12:29 PM   #4
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Re: Paint or Plasti-dip on penthouse bolts? Bad idea?

I should have mentioned the SMB has to sit in the driveway uncovered. That's the reason I'm feeling the need to protect them.

Quote:
Originally Posted by jage
The top penthouse bolts should have plastic caps. Are you talking about instead of, or under the caps or what?
I was thinking, remove the cap, paint, replace the cap. From the picture you added maybe just protecting the exposed metal of the flat washers would be enough.

Quote:
Originally Posted by Ford_6L_E350
If your top is painted, wax the top and the bolts a couple of times a year. If your top is gelcoated, use a marine sealant 1-2 times a year. If you have the textured top, use what you are comfortable with. I would caution you not to block the channel and cause water to pool more by the bolts.
I have a white top so I assume just gelcoated. I will have to look into the marine sealant. Thanks for the tip.
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Old 06-18-2013, 07:03 PM   #5
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Paint or Plasti-dip on penthouse bolts? Bad idea?

Not sure you need to do anything either. I replaced some of the penthouse bolts on my 89 as part of my solar project. The nut and hardware under the plastic were in good shape. The washers had some top rust where they were exposed but it was not serious. As long as the water is not trapped on top of the washer you should be fine.
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Old 06-18-2013, 07:22 PM   #6
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Re: Paint or Plasti-dip on penthouse bolts? Bad idea?

My van has a gelcoated top, and one of the washers rusted quite a bit. But only one (probably not galvanized), and that was since 2001. And the rust didn't really matter; I couldn't see it, only the birds could.

After developing some crazing in the gelcoat, I decided to bedliner the whole top, which I did with Monstaliner. I just painted over all the caps and washers. If I need to get it off I can, and I did the prep work to insure it stuck (primer, etc).

I'd just watch them, and take action as necessary. You'll probably have more pressing maintenance issues to worry about...and in any case, isn't SMB bedcoating the tops now anyway?
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Old 07-19-2013, 09:10 PM   #7
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Re: Paint or Plasti-dip on penthouse bolts? Bad idea?

One more suggestion would be to replace the originals with stainless steel bolts.
Remove an old one to determine the correct length, then use a stainless fender washer
and a stainless or chrome plated brass acorn nut on the topside.
Use a good sealant under the washer. Maybe something like 3M 5200.
Philip
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