I got this response on another forum when asking about Herculiner.
"I used it on a customers 48 truck; on the running boards, front bumper splash
pan, removable floor panels, etc. We used it because his metal was sooo pitted.
It covered all the pits (was blasted & primed first, maybe even painted them
with topcoat too, I forget).
We did the parts off the truck with the special roller they give you. After the
2nd coat dried a few days, I went to put the parts on. Some of the bolt holes
in the parts were slightly covered by the coating. I used a new sharp jack
knife to try to pry & chip the excess away, thinking it would peel it farther
that what I wanted. Wow, that is some tough stuff! I had to carve those holes
out.
I've read on forums that it will get slightly grey looking if exposed to
sunlight for 2 years.
The stuff has rubber chips in it. When it dries, these feel sharp as you run
your hand over it. That's my only concern."
