Getting Rid of Undercoat

[lantzn]

One thing I found to work EXCELLENT in applying a heavy stripper of any kind is a 3M undercoating gun. Most strippers mention using a brush or regular spray gun. I found using the undercoating gun under low pressure applies a nice heavy even coat of the stripper, therefore sealing the vapors in nicely. I found the NAPA brand stripper to work great in this gun. It's a heavy yellowish pastey stuff and works well. If you can heat up the panel in the sun first or if indoors use a heat lamp until the panel is hot, it really helps.
I'm sure this gun would work well with any heavy product.
When using a brush it tend to cause thick and thin uneven areas when applying. It also "breaks" the previous brush strokes vapor seal when you overlap it with the next brush stroke. So you end up with lines of stripped and unstripped areas.

http://cyberwerks.net/cars/cars.html

[BonzoHansen]

OK, a bit of an update. I tried the Peel Away 7 again. This time on my gas tank. I have changed my mind, I think this stuff works. This time it wasn’t a 1000* in the garage, and I scraped the first coat 24 hours after I put it on. A surprising amount of undercoating came off, and it is all softer. I am doing a second coat over the weekend. I also saw that my local Home Depot carries it, so it is easy to get for me. I will try to post some pics. The smell is not bad at all. But it does have an odor.

[BonzoHansen]

Home Depot --> Peel Away 7 --> wax paper --> dull putty knife & a small block of wood (of keep hitting the knife with your palm, which hurts after a while)

I just did my gas tank. This crap really loosened up the undercoating. I'll find some pics. Look in the paint & body section at pro-touring for more info.

Generally before, I actually started on the side part where you see the missing UC. But this gives you the idea of how thick it was on.

The magic tool. I kind of chipped away, but used a small block of wood to hit the handle. Notice the ends rounded off. No gouges. Some cratches, but 1) they will probably come off and 2) it's under the car.

After I am done, but still have to finish cleaning it. Then paint.

Here you see the paper removed with UC on it, and a pile of UC scrapings.


I left it on for a couple of days. The stuff seems to like the cooler air. I tried it in the summer and it dried out too quick. Now I could leave it on for days. 2 coats seemed to work. Coat, sit, scrape, repeat. It also seems to like sitting in the open air after pulling the paper off. Generally, it loosened the bond and allowed the material to scrape off.

They sell paper too, but I found regular wax paper works great.

It aint fun, but it is generally chemical free, UC is tough on wire wheels. Way easier to keep the garage clean. No kerosene.