Same for the Duplicolor stuff if you actually plan on using the bed for hauling stuff. Honestly, it's held up better than I expected, but it's fairly brittle, so it chips off with a decent impact. And brake fluid melts it.
For like $50 total, it's still not a bad deal, especially since you can do touch-ups with a $7 spray bomb can. I did the interior of the cruiser with it because it finishes smoother than herculiner and I didn't want the whole interior rough. Instead, it's snot-slick when wet . Oh well.
That Duplicolor stuff is trash, I tried everything to get it to stick and it just kept peeling off.
I used sand paper, alcohol, scotchbrite but nothing seemed to make a difference.
I have a dulicolor spray gun, prepped the jeep tub real well , and sprayed 4 coats on it letting it set up after each application, and it has held up fine for 2 years. I believe if it's prepped right, applied in the right temp, and has more then one coat they hold up just fine. Just my .02 though, i might have just gotten lucky who knows.