Hi Charles,(and List) The rust treatments like Corroless and POR-15 WILL come off with carb cleaner,brake cleaner,etc BEFORE they set-up....but if it dries on your skin,forget it. Only time or sandpapering your skin will take it off. Been there,done that. I wouldn't think that there is any reason to undercoat. I believe the makers of the rust preventatives/sealers advise you NOT to thin it. Sometimes undercoating just fills-in drain holes and seals in moisture. Steve from Albany,N.Y. <--busy at work once again...s'posed to be checking weather. ;) '75 Imp 4dr <--garaged and protected from the sun. '79 440 powered 35 ft RV <--roof-job consuming all of my free time...and there ain't much of that. ----Original Message Follows---- From: "bom tie" <bomtie@xxxxxxxxxx> Reply-To: mailing-list@xxxxxxxxxxxxxxxx To: mailing-list@xxxxxxxxxxxxxxxx Subject: IML: Corrorless and gas tank sealer Date: Mon, 1 Jul 2002 21:06:20 -0400 (EDT) I know we have been down this road a 1000 times but here is a new twist. I was using Corrorless (sp?) the other day and got some on my hands, and I washed it off with some carb cleaner. This got me to thinking when I get gas tank sealer on my hands, atomic power will not remove it. Could a person use (on a frame) corrorless then brush on gas tank sealer (could it be thined?) and then use undercoating. I could be going overboard here, just wanted to fix a car that would last a lifetime or two.Charles _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx