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Surface Rust

Posted: Wed Feb 15, 2012 9:24 am
by whc03grady
How much does one worry about this sort of sunburn? Run away?

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Re: Surface Rust

Posted: Wed Feb 15, 2012 9:34 am
by RSorak 71Westy
No thats not really a big deal at all. They make some marvelous rust removers these days and then prime and paint.

Re: Surface Rust

Posted: Wed Feb 15, 2012 9:51 am
by Amskeptic
whc03grady wrote:How much does one worry about this sort of sunburn? Run away?

Image
Any rust that is not structural is surmountable. The surface will be almost invisibly pocked after you have sanded it down, so you will want to clean it well and use a good metal bonding primer. Cute car. You want it?
Colin

Re: Surface Rust

Posted: Wed Feb 15, 2012 10:32 am
by whc03grady
Amskeptic wrote:
Image

Cute car. You want it?
Colin
I do (assuming it's in good shape otherwise, of course), for Esmé who turns 4 on Sunday. I've been kind-of-but-not-so-seriously looking at Beetles for her because (a) she likes them (she wants to paint each panel a different color, which I'm not horrified by); (b) by the time she's old enough to drive, I suspect even later-model, unremarkable ACVWs, even Beetles, will be pretty expensive.

Re: Surface Rust

Posted: Wed Feb 15, 2012 11:19 am
by hambone
Check out my type3 resto, that thing was solid patina. Used a palm sander and then lots of elbow grease.
Afterwards, pickle with naval jelly, wash it off with water. Use rust catalyzing primer on the minor pits, POR15 on the deep stuff.
Make sure the heater channels under the doors are ok, that is pretty much a death sentence for a Beetle.

Re: Surface Rust

Posted: Thu Feb 16, 2012 12:33 pm
by Amskeptic
hambone wrote: Make sure the heater channels under the doors are ok, that is pretty much a death sentence for a Beetle.
They sell replacements. Keep driving. I am sad that these cars are just disappearing on us. I shall take a Hippie Welding Class.
Colin

Re: Surface Rust

Posted: Thu Feb 16, 2012 3:15 pm
by Bleyseng
Once sanded down to bare clean metal use a epoxy primer to seal the fresh metal then a sanding primer. H20 goes thru most primers and I don't like Por15.
You can also use Ospho first to neutralize the rust then the epoxy primer...

Re: Surface Rust

Posted: Fri Feb 17, 2012 10:08 am
by hambone
Replacements are available, but this is major surgery. It is a multipiece assembly, and it must be welded together with precision or the body won't be plumb. Expensive.
POR15 works really well in the wet NW, I swear by the stuff after years of trouble-free use.

Re: Surface Rust

Posted: Fri Feb 17, 2012 11:48 am
by Bleyseng
I have had por 15 peel off clean bare metal in a few years, not good. Epoxy primer is awesome stuff for a base.

Re: Surface Rust

Posted: Fri Feb 17, 2012 1:12 pm
by Amskeptic
Bleyseng wrote:I have had por 15 peel off clean bare metal in a few years, not good. Epoxy primer is awesome stuff for a base.
Brand? website review? Discussion of how we could have such a disparate experience? Did you Por15 on a hot humid day in Suriname?
Colin??

Re: Surface Rust

Posted: Fri Feb 17, 2012 4:34 pm
by hambone
POR15 needs a rusty or rough surface or it won't adhere correctly. It doesn't like to go over shiny paint either, it will peel.
I've used it for an undercoating substitute on my bus, even behind the wheels. It is tough stuff.
I have used gallons of the stuff over the years, floor pans, heat exchangers, bumpers you name it.

Re: Surface Rust

Posted: Fri Feb 17, 2012 5:53 pm
by vdubyah73
brake fluid will lift it. it will lift under a floor mat to. both happened on my buggy. whole pan was sand blasted to bare metal. floor mat was caused by grit scratches. m/c leak into the crossmember for a period of time caused the drivers side bottom to peel in sheets. i didn't use their metal prep stuff. would it have made a difference? maybe.

Re: Surface Rust

Posted: Fri Feb 17, 2012 6:30 pm
by ruckman101
The metal prep eats into the metal, etching it a bit, giving it "tooth" for the POR 15 to adhere to.


neal

Re: Surface Rust

Posted: Sat Feb 18, 2012 1:14 pm
by vdubyah73
sandblasted the entire pan, when it was in three pieces as well as the new floors. there was no paint, grease or rust on my pan or beam. plenty of tooth from blasting with pressure pot blaster. i think brake fluid is just seriously corrosive. plus it'll suck moisture right out of the air.
hygroscopic??

Re: Surface Rust

Posted: Sat Feb 18, 2012 1:17 pm
by RSorak 71Westy
Brake fluid is well known for its ability to remove paint.