Some folks on my houseboat group love truck bed liner...
Sand - DA, 150 grit (sand flat, sand any lifted edges to flat.) The PO
had already filled and smoothed the damaged area on the prow with what
looked like 5200 or maybe bondo so I didn't have to do any filling.
Small chips were not addressed yet they disappeared completely.
Clean sanding dust with moist towel
Spray
I used U-Pol Raptor bedliner kits, purchased through Amazon. The
4-bottle kit with a Shutz gun was $129 and a second kit without the gun
was $119 (shipped). One kit is enough for a pickup truck bed. When I ran
out of product, I bought a third kit a the local auto paint store for
$212!!! (and brick and mortar stores wonder why they're going out of
business).
U-Pol bedliner material is available in black and "tintable" versions.
The tintable version requires a few ounces of automotive basecoat color
(any color). I have a cabinet full of leftover auto paint so I grabbed
some from an '86 Ford PU (very slightly tinted with tan toner) and it's
a perfect match to the other gel coat.
The surface finish can vary according to application air pressure and a
smoother finish is available through roller or even brush application. I
love this stuff! There are youtube videos showing use of the product on
entire hulls, including area below the waterline and down to the keel!
Strangely, they say that the dimpled finish increases top speed, similar
to the dimples on a golf-ball. I'm not quite ready to buy that story
but, hey, if it's on the internet it must be true, right? <wink wink>