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montanasurfer
Samba Member
Joined: March 06, 2014
Posts: 319
Location: United States
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 Posted: Thu Dec 13, 2018 5:30 pm Post subject: Sanding and Rust |
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Howdy Folks,
I have an '87 vanagon and no garage. I'm gonna paint the beast in a shop space that I've got my hands on. My time in the shop will be limited. I want to do all of the bodywork and sanding in the driveway beforehand. I live on the coast with nightly marine layer and the van is usually wet in the mornings. My question is this: After I have the van sanded and ready for paint, how long do I have before I've let the demon beast that is rust in? My goal is not to sand it to bare metal because I'd rather keep the Factory zinc coating. I'm hoping to sand it over the course of a week and weekend and then paint it the following weekend.
Thoughts? |
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theKbStockpiler
Samba Member
Joined: July 07, 2012
Posts: 2316
Location: Rust Belt
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| Posted: Thu Dec 13, 2018 6:06 pm Post subject: Re: Sanding and Rust |
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You have to state the details more. Would a tarp keep the condensation off of it?
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Use all safety devices including a mask. |
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jeffrey8164 
Samba Member
Joined: January 06, 2018
Posts: 3819
Location: Georgia
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| Posted: Thu Dec 13, 2018 10:08 pm Post subject: Re: Sanding and Rust |
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As long as you prime your bare metal before you quit each day you should be alright. Bare metal will rust overnight.
Just make sure that the car is really, really dry when you do paint it.
Moisture has a way of staying in the crevices and can will really ruin your day.
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Turning owners into mechanics since 1938.
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montanasurfer
Samba Member
Joined: March 06, 2014
Posts: 319
Location: United States
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| Posted: Fri Dec 14, 2018 10:55 am Post subject: Re: Sanding and Rust |
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| The central coast of California is a rust trap! I definitely plan on using a self etching primer on any exposed bare metal. Thanks for the input Jeffrey. I don't know how effective a tarp would be on preventing condensation. Since I'll have all the windows out it'd probably be a good idea to tarp it off anyways. Any other tips from folks? |
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Mike Fisher
Samba Member
Joined: January 30, 2006
Posts: 17970
Location: Eugene, OR
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| Posted: Fri Dec 14, 2018 11:19 am Post subject: Re: Sanding and Rust |
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You can wipe/spray on phosphoric acid solution rust converters on bare metal to stop rust indefinitely.
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69 FI/AT square Daily Driver
66 sunroof,67,70,71,71,71AT,72,72AT,73 Parts
two 57 oval ragtops sold
'68 Karmann Ghia sold
Society is like stew. If you don't keep it stirred up you end up with a lot of scum on the top! - Russ_Wolfe/Edward Abbey |
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Evil_Fiz
Samba Member
Joined: May 06, 2011
Posts: 1049
Location: Jacksonville, FL
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| Posted: Fri Dec 14, 2018 11:58 am Post subject: Re: Sanding and Rust |
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^^^ x2. I have my entire chassis and most of my Ghia's body in bare metal coated with Eastwood After Blast which is a cleaner/phosphoric acid solution that leaves behind an iron phosphate and zinc phosphate surface treatment. The car is kept indoors in Florida with no signs of rust. It has been that way for several months. Coat any bare metal with Ospho or Kleen Strip Prep & Etch and cover the car with a large tarp and you should be fine; even better If you primer or epoxy over the phosphoric acid treatment.
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Emil
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“…It's not just about what's interesting. It's also about what's helpful, and it's helpful even if it helps just one other guy working on a Ghia.”
kiwighia68
See my build on TheSamba at:
The K_R_A_K_E_N_N : a 70 Ghia Convertible reinterpreted |
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surfinwesty
Samba Member
Joined: March 01, 2008
Posts: 313
Location: Petaluma, California
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| Posted: Tue Apr 23, 2019 10:48 pm Post subject: Re: Sanding and Rust |
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| Mike Fisher wrote: |
| You can wipe/spray on phosphoric acid solution rust converters on bare metal to stop rust indefinitely. |
Is there a brand you recommend? Or just use that chemical compound and go to auto parts tore? |
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Evil_Fiz
Samba Member
Joined: May 06, 2011
Posts: 1049
Location: Jacksonville, FL
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| Posted: Wed Apr 24, 2019 7:09 am Post subject: Re: Sanding and Rust |
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EDIT: I apologize for being repetitive. I forgot I had already provided feedback.
| surfinwesty wrote: |
| ...Is there a brand you recommend? Or just use that chemical compound and go to auto parts tore? |
I used Eastwood After Blast with good results but if I had tt do it over I would go with Klean Strip prep & Etch. It is available locally at Home Depot and is a bit cheaper. Ospho is another widely used product but is a bit pricier than the other two. The Master Series product line also has a Phosphoric acid treatment available.
Here is a link to Klean Strip 1 gal. Phosphoric Prep and Etch --- $17.97. The Eastwood product is about $25.00 a Gal. + Shipping.
I covered my entire Ghia convertible body, chassis, and suspension/brake parts with just over a gallon. You can use the product to wipe down the metal until it is clean or clean the metal first then apply the phosphoric acid.
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Emil
_________________
“…It's not just about what's interesting. It's also about what's helpful, and it's helpful even if it helps just one other guy working on a Ghia.”
kiwighia68
See my build on TheSamba at:
The K_R_A_K_E_N_N : a 70 Ghia Convertible reinterpreted |
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Olli from NJ
Samba Member
Joined: May 10, 2007
Posts: 302
Location: Milton,DE
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| Posted: Wed Apr 24, 2019 1:16 pm Post subject: Re: Sanding and Rust |
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I bought some Picklex but haven't used it yet.
https://picklex20.com/
Olli |
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