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Yannvanh
Samba Member
Joined: November 07, 2020
Posts: 143
Location: Belgium
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67ctbug
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Joined: January 24, 2016
Posts: 3625
Location: CT
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 Posted: Mon Nov 27, 2023 5:17 pm Post subject: Re: Wire wheel before epoxy? |
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I would run over the easier to get areas with a DA just to even the scratch out, it will probably stick fine.
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| KentPS wrote: |
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viiking
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Joined: May 10, 2013
Posts: 2670
Location: Sydney Australia
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| Posted: Tue Nov 28, 2023 3:43 pm Post subject: Re: Wire wheel before epoxy? |
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I've always roughed up any surface that has been wire wheeled. I just feel that wire wheeling polishes the surface a bit too much.
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Evil_Fiz
Samba Member
Joined: May 06, 2011
Posts: 1049
Location: Jacksonville, FL
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| Posted: Thu Feb 29, 2024 2:03 pm Post subject: Re: Wire wheel before epoxy? |
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| viiking wrote: |
| I've always roughed up any surface that has been wire wheeled. I just feel that wire wheeling polishes the surface a bit too much. |
This, and most epoxy brands recommend 80# on a DA.
Hit the metal with 80# using a DA sander or by hand, blow it off with compressed air, clean it thoroughly with wax & grease remover until the cloth comes up clean, then hit it with 2-3 wet coats of epoxy. The first coat of epoxy should be lighter to prevent cratering and provide a good bond to the metal. And don't use any acid treatment if you plan to use epoxy.
I did an adhesion test and found that epoxy stuck well to smooth metal. You can read about it here:
https://www.thesamba.com/vw/forum/viewtopic.php?t=789397&sid=84958a4c935cbe6cdd1c647db93ca48b
Regardless, I would not do that in the real world.
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Emil
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See my build on TheSamba at:
The K_R_A_K_E_N_N : a 70 Ghia Convertible reinterpreted |
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