Im removing the undercoating frome my inner front fenders and man the previous owner really got carried away.In some spots its an inch thick!On the up side theres no rust.Oh well ive got a heat gun, metal scrapers and the straitjackets on order.mike
If it is hard I have had good luck heating it with a O/C torch just a little. It comes off real easy with a putty knife then. Do it outside.
you guys are going the wrong way with heat. dry ice from a party store works the best. It makes it hard and shrink and flake right off with a putty knife. When i build a race car out of a stock tub it takes around 4 hours to remove all the under coat seam sealer and sound deading from the whole body with dry ice.
Liquid Wrench, of all things, is the fastest undercoating remover i've ever seen. Spray it on and let it soak in and it'll soften the stuff up enough that you can wipe it off with a rag. Got it on some undercoating I DIDN'T want removed, six months later the liquid wrench still hadden't dried and the undercoating was still soft to the touch and easily removed.
Hey Mike, I saw your posting over on the Galaxie email list. Didn't know you were here too. Got any pic's of your car? Back when I was a grease monkey at the local Ford garage in the mid-70's we undercoated a lot of cars with that crap. Dried hard as a rock, cracked and trapped water and salt behind it. I'm pretty sure it made the rust problem worse, not better. Rick 65LTD
i've always used the $1 cans of oven cleaner from $ general. I'll have to try the dry ice and liquid wrench
late addition... Got to thinking about the undercoating so I took a look at it while I was in the garage last night. Still soft enough to rub off with your fingers. Sprayed it first week in May last year.... 9 1/2 months?... and the shit still ain't dry....
I used a heat gun and then WD 40 to remove undercoating from a Corvette (Yeah, I know, fiberglas doesn't rust) several years ago. The frame had bad rust because the undercoating had loosened and let salt get behind it. On the other hand, pictured is the underside of our 51 Merc that was undercoated. Factory paint is bright underside of fenders too. The undercoating dry and hard and is peeling off in chunks. Dry ice sounds like a less messy approach, I will try it on the Merc. Ol Blue
What would be a benefit of using the dry ice is that when you are done the only mess would be the undercoating itself as the dry ice would just dissipate. So no oily residues(lakes,quagmires or piss puddles).
How do you apply the dry ice to the undercoating? Just hold the block against the floor pans, or????? -Brad
dont touch dry ice with your hands. you will et frost bite. basicly you just set it on the floor or area for a minute and the under coat just flakes off.
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