So I have started to spray the underside of my car with a bed liner product. I am using UPOL's Raptor liner. As much as I knew I wanted to do this I was very apprehensive to actually do it. My car as it sits was blasted to bare metal and then covered in black 2K epoxy inside and out. The underside is still in that epoxy and looks so awesome (top side is already in paint). This was a rust free car to start with so the metal floor pans, rails and such look virgin. OK, there are a couple little dents here or there from a poorly placed jack but other that that it is great. Others warned that spraying it in liner may make it look like I was trying to hide something. Conversely, I really wanted the protection the liner would provide along with an additional level of some noise control. As I am known to do, I hemmed, I hawwed...screw it, I started to spray.
The Raptor product is a two component material. It comes in bottles to which you add a specific amount of hardener, shake well and then spray with their "gun" which screws right onto the product bottle. Very slick actually. The only issue with it this way is that you have to make a certain "batch" amount.
I used one of the four bottles in the kit I purchased to do the front end (outer aprons, shock towers and rails). I put on two coats here for added protection from the tires kicking up rocks, etc. I also sprayed the outer shock tower covers. When finished I ended up with about a quarter bottle I ended up tossing. I wasn't ready to spray elsewhere at the time. I probably could have also covered the underside side of the fenders had I tried. Should give you some idea of what a bottle will get you.
I ended up setting my air pressure at 45 psi to get the pattern and weight I was after. The stuff sprays really well considering how thick it is. I made just a few practice passes on a piece of cardboard before hitting the car. I am pretty familiar with a spray gun (painted my car) but I think just about anyone could spray this stuff. Keep a steady distance and consistent movement and you'll be fine. Laid out nice and even, gave good coverage without any heavy build-up or such. Clean up was easy too. I just poured some Acetone in a can, set the gun pick-up into it and sprayed it clean quickly. I will say you need to clean it right away as when it sets up it is like tar pretty fast.
Turned out just how I had hoped. You can see every overlapping edge of the original metal so no "hiding" stuff with it which eased my fears about a future sale. Then again I will never sell but anyway... The texture is great. The heaviness of it should help deflect rocks and dampen noise across the panel too. All said and done, very happy I went through with it. The underside should look great for a VERY long time wearing this stuff.
