new use for cheap gun... tar removal
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Posting Guru
Joined: Mar 2005
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From: western montana
new use for cheap gun... tar removal
always screwing around and trying to get ahead with less effort. I got a freight harbor paint gun from my dad that was on sale for like 8 bucks to go with my iwata and IR guns... Not a hvlp.
So I've been trying to get tar and other stuff off my torino...who in the heck uses tar undercoat....??? bad idea. Anyway i've always used laq thinner in a gun to clean an area but with the pressure dialed up...100+lbs... and the gun metered way down it becomes a very effective way to clean those nasty parts under the car... should use a respirator etc....uses little solvent and with a rag I cleaned up a whole lot that would have taken far more time otherwise.
Let the thinner soak in the tar undercoat to weaken it then blast and wipe...
So I've been trying to get tar and other stuff off my torino...who in the heck uses tar undercoat....??? bad idea. Anyway i've always used laq thinner in a gun to clean an area but with the pressure dialed up...100+lbs... and the gun metered way down it becomes a very effective way to clean those nasty parts under the car... should use a respirator etc....uses little solvent and with a rag I cleaned up a whole lot that would have taken far more time otherwise.
Let the thinner soak in the tar undercoat to weaken it then blast and wipe...
Fleet Mechanic
Joined: Aug 2007
Posts: 1,834
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From: Piney Woods of East Texas
Most tar coatings can be removed using Mineral Spirts, Naptha or WD40. Under coating was big in the 70's, used to help quiet the road noise. Why would you want to remove the under coating from it. It has held up for 35+ yrs, you can't say that about most products.
I would never spray laq thinner for that purpose. Besides if you still have the original paint it will attack it. And I know you can not keep it from going places you do not want. Now you wonder why HVLP guns are being required? 70% of what you spray does not go on, it splashes off due to high velosity. Use a paint brush instead.
I would never spray laq thinner for that purpose. Besides if you still have the original paint it will attack it. And I know you can not keep it from going places you do not want. Now you wonder why HVLP guns are being required? 70% of what you spray does not go on, it splashes off due to high velosity. Use a paint brush instead.
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Posting Guru
Joined: Mar 2005
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From: western montana
no original paint that i'm worried about and the other methods are weak in comparison. it uses very little thinner this way..i wouldn't use it otherwise...and the pressure seems to help it penetrate quicker etc. This is not typical spray gun pressure and you could use whatever solvent you would like...i've done it every other way i could think of and happened on to this and it works. I do absolutely agree that this should not be used on a car that was not be completley prepped unless you know what your doing. Where i would have used a half gallon of solvent i used less than a pint.
Tar was a bad idea...this car was parked in a garage for 22 years and not licensed or driven for those years and wherever there is tar there is rust under it. Only half of the car was undercoted...after a wreck...the untreated side is rusted a bit as well but i can get at it and it's not an issue. Perhaps it's all that was available but it's still being used and thats not a very bright idea. I've yet to work on a tarred car that didn't have a rust problem...would rather spray the underneath with used hydrolic oil and let the dust ride.
I'll leave the paintbrush to you....
Tar was a bad idea...this car was parked in a garage for 22 years and not licensed or driven for those years and wherever there is tar there is rust under it. Only half of the car was undercoted...after a wreck...the untreated side is rusted a bit as well but i can get at it and it's not an issue. Perhaps it's all that was available but it's still being used and thats not a very bright idea. I've yet to work on a tarred car that didn't have a rust problem...would rather spray the underneath with used hydrolic oil and let the dust ride.
I'll leave the paintbrush to you....
