80LS1T Posted June 21, 2004 Share Posted June 21, 2004 What does every one do for painting/coating the underside of the car? I know some guys treat it like the rest of the car and prime and paint it. I dont think I want to do that but I would like to get it sealed off from moisture and have it look nice. It does have that rubberized coating on the bottom now but its showing signs of its age and its starting to peel off. My first question is how do I get that old undercoating off? My second question is what do you guys recommend for a new paint/coating? Guy Quote Link to comment Share on other sites More sharing options...
EvilRufusKay Posted June 21, 2004 Share Posted June 21, 2004 I used paint stripper to remove most of my undercoating. However a mewmber here recomended carb cleaner. That worked great. I don't recomend heating it because it gets gooey and hard to remove. I used POR-15 0n my floorboards but a couple guys were talking about a light truck bed spray on liner I think. Try a search for bedliner. I think you will find it. Take a look at my site to see what fun I had removing it... Rufus Quote Link to comment Share on other sites More sharing options...
wheelman Posted June 21, 2004 Share Posted June 21, 2004 I used an air chisel and oven cleaner to remove the coating from mine. It was real dry and brittle and most came off with the chisel. I haven't applied new coating yet. Wheelman Quote Link to comment Share on other sites More sharing options...
78zlt1 Posted June 21, 2004 Share Posted June 21, 2004 I bought a needle scaler attachment for my air hammer at harbour frieght (best $14 I ever spent) goes thru undercoating like a fat kid eating potato chips. I did the whole bottom of the car and inner fenderwells in about 4 hours, wiped it down with paint thinner to clean up the residue. ( on a rotissery) but dont use it on the inside of the front fenders use the carb cleaner there. I was thinking of going the bedliner route , but waiting to see how others faired with it first. Quote Link to comment Share on other sites More sharing options...
Drftn280zxt Posted June 22, 2004 Share Posted June 22, 2004 I always thought a cool undercar treatment woulf be diamond plate steel. it looks awesome and is stainless. As far as roving the other stuff goes carb cleaner or brake cleaner my work good. Quote Link to comment Share on other sites More sharing options...
Guest Z-fried Posted June 22, 2004 Share Posted June 22, 2004 Diamond plate stainless steel is an awful heavy and expensive way to try to cover the underside of a car... doesn't make much sense. Plus how would you seal it to keep moisture between it and underside of the car? I plan on using a heavy duty chassis paint and then cover it with truck bedliner. The rubberized undercoating doesn't hold up and then traps moisture after it breaks down. Quote Link to comment Share on other sites More sharing options...
Wagz Posted June 22, 2004 Share Posted June 22, 2004 A heat gun and a scraper took care of the underside of my 240. I cleaned up any residue with laquer thinner. Once it was clean, I sprayed it down with POR-15 metal prep, 2 coats of POR-15 black. let it cure for two weeks and gave it all a light sanding. Finally, I topped it all off with several coats of 3M rubberized under coating. It looks great and should last a long time... Of course, this was all done while the chassis was on a rotisserie. Quote Link to comment Share on other sites More sharing options...
Phantom Posted June 22, 2004 Share Posted June 22, 2004 check this stuff out: http://www.ceramicadditive.com One of the coatings (click on ceramic insulating paint and then primers-sealers)has an extremely high moisture barrier rating plus it is a sound deadener and heat insulator. The site has links to testamonials. You would think this stuff rivals the second coming of Christ from what everyone says about it. My only problem is that I was unable to find hard, definitive numbers on its performance. Quote Link to comment Share on other sites More sharing options...
SSflyer Posted June 23, 2004 Share Posted June 23, 2004 There's usually an add on EBAY listed as 'Undercoating'. It's for a 6-pack of 3M spray undercoating. The 3M web page makes it sound like pretty good stuff. There's no telling if the EBAY price is a good one, but a call to an auto paint store would end that mystery. I had good lick with another 3M spraycan undercoat, so this might be ok to try. Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted June 23, 2004 Share Posted June 23, 2004 I have the needle-scalar attachment that I will be using. After everything is down to metal and floorpans replaced and subchassis connectors put in, I wil put on 3 coats of Zero Rust, the either 3M undercoating or bedliner... Quote Link to comment Share on other sites More sharing options...
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