I am about to pull the trigger today and spray my underside with Raptor bed liner. Everything I have read seems to be good, but if you had a bad experience I want to hear about it!
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I applied it over an epoxy primer. I hope that is ok? Job is done and it looks great!

I thought i would share my pics of yesterdays hard work.
DO IT!
. I know of very few coatings (besides surface primers, of course) that should be applied directly to self-etching primer.
Good job! Looks nice.
How much did you use to do the underside of the 40 tub? And how thick do you think it is?
Thanks
Looks fantastic!!!
Where are you guys buying Raptor? I see it's on Amazon. Can you spray it with any regular undercoating gun?
JD
Hi Miker,
I used one kit with 4 liters. It did 2 full coats with a bit left over. I used the leftovers to get to all the tight spot with a paint brush. Not sure how thick it is, but I think its thick enough. I didn't do the firewall since I want this to look stock. I also think that cleaning oil and grease off the fire wall would be difficult if you had a tinted color on there. The texture would trap dirt. I would only consider doing this to the fire wall if it was black. Then you could wipe it clean and armor all it. Personally I think factory color paint is the only way to go on the firewall. If your going to do the firewall I would say buy 2 kits. That's 8 liters total.
I sent an email to a customer rep at u-pol.com, and she sent a list of local dealers.There were several in my state (Maine), and one was only 30 or 35 miles away. I ended up paying $109 for a 4-liter kit that included a Shutz gun. That was quite a while ago, so prices probably have gone up. You should go to the U-pol website so that you can find a local dealer. You might end up saving some money.