What is the best way to remove undercoating?
 

I'm getting ready to work on the underside of my 72 442, What is the best way to remove undercoating?

My car was completely torn down, had it sand blasted. Turned out very nice.....took all the rust, undercoating and grime away.

just had the bottom of my 55' chevy done. Took away 99.3% of the grime and undercoating...:thumbsup:

I had to use a propane torch to heat it up a bit then it comes off like butter. Then I used paint thinner in a spray bottle ( after and separate from torching :D ) let it soak then wipe away with lots of disposable towels...the blue or paper ones. It is a lot of work but turns out well. My media blaster said the media won't remove undercoat.:rolleyes:

Heat gun and a wood paint stir stick to keep from gouging the metal for 98% of it. Wax/gease remover and a brush to aggitate the remaining residue.

I was looking for another method other than sandblasting. I just finished sandblasting the frame and will never do anything that big again, the mess is just too big.

Angle grinder with a wheel cup wire brush works pretty quick, just messy as all get up when you are underneath it.

Have some one else do it, is the best way!

Tiger torch, scraper, welding gloves and beer is next best IMO.

Thanks for the replies guys....looks like another messy project.

This is the way I did. It gets you dirty, but you can do it in your shop when you have time and saves $$ for other car stuff.

i used an industrial strength, concentrated degreaser and let it soak 3 or 4 times and then went at it with a heated power washer.:thumbsup:

this thing kicks butt for this job.

http://www.autobodytoolmart.com/pc-1...kit-18256.aspx

Darren

Two more ways
 

You can bruch on adhesive remover - you can buy that from home depot by the gallon. Just let it set for a while and scrape it off. Nasty mess.

If you have it on a rotisserie, then I'd suggest renting a power steam cleaner/washer. You can just blast away the undercoating/etc. works really well :thumbsup:

Just tried a propane weed burner and plastic paint scrapers. Scraped off like Butter! The scraper eventually lost its edge due to heat so it requires 2 or 3 per wheel well. Finished one well in less than an hour. Best of all the the debris got hard again right away and swept right into a dust pan.

I use an air hammer with a flat edge. Chipped right off.

Got the hard to reach areas with a wire wheel.

They say this tool cuts through it like butter and is great......I haven't personally used one but I am considering the purchase of one for my cars......

http://buy1.snapon.com/catalog/item....re&dir=catalog

After just finishing mine, I'll never not have it blasted off again. It takes to much time and is a total PITA, no matter how you do it yourself.

99.3%

The specificity of that just made me chuckle. I get what you mean, but it still made me laugh.

I did mine with oven cleaner, scraper, torch, wire wheel and power washer.

Mine was on there thick and hard... so I had to use a combination of stuff. What a frickin mess.

I spoke to the shop that was gonna blast my car and they said alot of undercoating is hard to get off since the beads want to bounce off it or just dent it in.... takes alot of time to get it all off. They could do it but it added quite a few hours to the job. So doing it myself probably saved me a couple of hundred bucks....but it was a huge PITA.