Refinishing underside of car. What have you guys used?

[namtrok]

Ok I thought I'd post this in the mk1 forums since I figure maybe more of you have experience with this. I have a mk2 that's in really good shape. No rust under the car at all. But some of the undercoating is peeling off. Anyway I wanna re do the whole underside of the car. Rust-proof/seal it. But have no idea what to do or what products to use. I was thinking it would make sense to fully strip all the undercoating off first and start from there. But I have no idea what to use to get it all off. And what do I lay down as rust prevention? Or if tere is a progust thats basicly the same exact thing that vw uses at the factory. I'm pulling all the subframe and rear beam and all stuff under the car so I'll be re doing everything else as well.

[sk8ordie]

por-15. I top coated the por with herculiner. My pops used a 3M roll on undercoating on his caddy at the same time. the 3M looked nice also.

[namtrok]

How long ago did you use them? Does one seem to be holding up better than the other?

Any idea how to get all the old undercoating off? Or am I just gonna have to go scraper crazy.

[canexrabbit]

31 years of dirt rocks and road grime

[naterkane]

How long ago did you use them? Does one seem to be holding up better than the other?

Any idea how to get all the old undercoating off? Or am I just gonna have to go scraper crazy.

a scraper won't work... most people get a face shield and a knotted wire wheel for an angle grinder, and go to town with that.



knotted wire wheels come with different gauges of wire... the thicker the wire, the faster it'll eat through the undercoating.




eastwood makes an undercoating dissolver, but i don't know how well it works as i've never bought it before.

[Vegeta Gti]

por-15. I top coated the por with herculiner. My pops used a 3M roll on undercoating on his caddy at the same time. the 3M looked nice also.

this,i use the spray after the roll on is dry

Sent from my SPH-D710 using Tapatalk 2

[namtrok]

picked up a few knotted wire wheels today. im gonna order some of that undercoat disolver. just to see if it works. if not, atleast i gave it a shot. thanks for your help!!!

[naterkane]

no problem... i can only seen needing the dissolver for crevasses that you can't get a wire wheel or cup into.