Removing old undercoating

[turbotim2]

I have tried a few ways to remove the old spray on undercoating but am having a heluva time with it. I have tried sand blasting (sand bounces off), twisted wire cup brush (spins the rubber around and melts it, does not come off), heat gun (it just melts and sticks to everything and rehardens when heat is removed). Any chemicals that will attack it? I am not worried about paint as that is coming off too. Thanks.

 

[phred]

Putty knife with the edge sharpened and lots of time. Been there done that. Only other sure fire way is to dip the body.

 

[deltarat]

The paint shop sand blasted mine out. Lacquer thinner will loosen it up while it is still damp, but you have to scrape it before it evaporates.

 

[camomog]

Try goof-off worked on my frame shouldn't damage the paint but be careful just the same.

 

[fastcarkenny]

you can try some amonia based grafiti remover. You might laugh, but that stuff is wicked! Do it in a WELL VENTILATED area.

 

[turbotim2]

Thanks for your suggestions! I will give these a try and see what happens. Thankfully it is mostly just in the wheel wells and firewall and not all over the tub. I will report back.

 

[John Marinan]

Eastwood sells an undercoating remover. I haven't used it so I can't say how good it is.

 

[Dave]

Paint stripper containing methylene chloride (aircraft stripper) Brush it on and pressure wash it off. You need to wear very protective clothing and a face shield.

 

[iwlbcnu]

if it is the original stuff it should be hard enough that I just used an air chisel. You'll learn the angle real quick. All mine just chipped right off, then a little brake clean to clean up.