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Originally Posted by rmrtndl
Have you had any problem with the color fading or having a milky appearance?
I have read POR-15 is UV sensitive. I don't think the frame will get any direct sunlight (insert witty comment about rolling the truck here). Anyone know if indirect light will cause fading etc?...
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POR15 is UV sensitive. When I first started using it, I had some fade on me. Looked worse than flat black. Best online comment I ever heard is, "It looks like @$$."
That's why I mentioned above that I topcoat POR15 with Extreme Chassis Blk while the POR15 is still tacky (usually 3-5 hours after application). Any UV resistent paint will do, such as a store gloss black or any other gloss color. I just like the higher solids content of Extreme Chassis Blk.
Just for info, if POR15 is left to dry before topcoating, it dries so hard and smooth that it has to be scuffed up to give the topcoat something to adhere to. It arguably needs POR15's Tie-Coat primer, too. However, by topcoating POR15 while it is tacky, no scuffing or primer is needed which saves time, effort, and $$.
This is particularly important to me when I'm coating axles, frames, brackets, and other parts that have many cavities and areas that I can't reach with sandpaper, so I couldn't scuff all of the POR15 surface if I wanted to. Tacky-time topcoating is the best UV-protection method I've used, so far. Learned it from a POR15 rep.