Undercoat removal inside 1/4 panels

[JoeyD1968runner]

Gents,

Any suggestions on how to remove the undercoat inside the 1/4 panels. I don't want to warp them with heat. It seems it will absorb the media if blasted. It seems 1/8" thick.

Any my help would be great.

Joe

 

[eldubb440]

try brushing paint stripper on it......... has worked well for me........ contain the mess

 

[Donny]

Blasting media will chew it off, but, you'll have media everywhere. Maybe a little Diesel fuel in a squirt bottle, and spray and soak and scrape would work?

 

[JoeyD1968runner]

Thanks,I figured breaking the chemical bond would be safer then brute force.
Joe

 

[ipstrategies]

Here is what I have used to get the undercoating off the bottom of my 71 charger.

http://www.harborfreight.com/1500-watt-dual-temperature-heat-gun-572-1112-96289.html
Only $8.99 with coupon 27893807

I found it working best with a duller edge putty knife the kind with the d shaped notch like this http://allwaytools.com/product/5-in-1-all-steel-putty-knife-1card-tg1/
I wore gloves and applied the heat to the blade and the allows to scrape off like a thick butter. It created the least mess and odor. Take your time so you do not gouge the metal.

 

[zyzzyx]

Joey, I've done this with two cans of Gunk Engine degreaser. one can per side. Take out the drainage plugs in the bottom of the trunk extensions and put some pans down to catch the slop as it drains down. when your all done, you can spray everything down with Super Purple Degreaser and spray it down with a garden hose. Works great!

 

[Seventy]

I wouldnt over think this, http://www.lowes.com/pd_6058-78-GJBP00203_0__?productId=3586548 that product works for me, a gallon goes a long ways too, I brush it on, do about 2 sq ft at a time, then just scrape it off into a bucket, I do it on the lift with a kiddie pool under where I am working...
We did a nova in the beginning of the summer, who ever built the car did a great job painting the car, but under coated the entire bottom, I thought it was to hide shoddy metal work, but when we stripped it I found nothing suspicious. We stripped it, power washed it, dried it, Da'd it, wiped it down with lacquer thinner, POR 15'd it, then used por15's primer, and then base coat clear coated the entire bottom of the car. Its a friends car, he did all the hard work, I just supplied the garage, lift, tools, and know how...

So, that is what I would do, that jasco epoxy stripper and a scraper.. good luck, it took us 3 days, but we pulled the tranny, rear end, and gas tank out, and also had to strip and pain them, they under cated teh **** out of that bottom, he said there was receipts for 11 cans of rubberized undercoat with the cars paper work, lol..

 

[doberjoe]

I think I recall using lacquer thinner to cut the undercoating, along with a putty knife. I did use some mechanical methods too (like a medium ~4" diameter conical wire wheel and my angle grinder, ya gotta hold on with 2 hands though! I used lacquer thinner go over some of the spots missed using a hand-held wire brush and thinner (like brushing your teeth).

I do remember soaking some window trim pieces with the black gunk embedded in lacquer thinner and it came off pretty easily.

Make sure to keep it away from your painted surfaces!!

 

[Melifluonze]

I just did this for my Dart. Engine de-greaser first, let it sit for a bit, then a power washer stripped the undercoat right off to the paint. I just took the time to cover everything important and not hit it with the power washer. No paint was lifted (except where the metal was degraded) It's like painting, but the inverse! Works VERY well.

I'd assume that a combination of soaking with the appropriate solvent that would attack undercoating versus anything else (like paint), letting the solvent do its work to soften the undercoating, combined with a power washer at a fairly strong setting is a great combination!

- Melifluonze

 

[JoeyD1968runner]

Thanks fellas. I used a stripper product from lowes. Worked well.

 

[MOPOWER871]

I did this to my 68 roadrunner i used a scraper flat blade screwdriver and a small trapping hammer the stuff is thick and brittle will fall off , them you can chemical clean labor of love , get a 6 pac of your favorite brew and a radio ,goggles a tarp and go to town

 

[Dennis H]

I did this to my 68 roadrunner i used a scraper flat blade screwdriver and a small trapping hammer the stuff is thick and brittle will fall off , them you can chemical clean labor of love , get a 6 pac of your favorite brew and a radio ,goggles a tarp and go to town

Good advice. Protect yourself. My welder ended up in the emergency room with a rash when removing undercoating for the subframe connector install.

 

[Runner 68]

I did this to my 68 roadrunner i used a scraper flat blade screwdriver and a small trapping hammer the stuff is thick and brittle will fall off , them you can chemical clean labor of love , get a 6 pac of your favorite brew and a radio ,goggles a tarp and go to town

$hitty job no matter how you look at it. I guess I'm the moron. I did mine the old fashioned way with a respirator, 4" wire wheel, case of my favorite brew and a 200 watt stereo.