Bedlined my door hinges....My advice is either:
1) Do a better job of taping your doors off than I did, or remove hinges completely from doors (overspray is not fun to clean up
2) remove hinges completely, take to your local LINE-X or rhino and have them professionally done. Honestly, it would cost you maybe 5 or 10 dollars more than buying a single can of spray on and tape, it is more durable, and will looks better, IMO.
I taped them off:
280 grit sandpaper
Duplicolor spray-on bedliner (it kept bubbling up on me, but I pressed it down with my fingers about 7 minutess after spraying and applied a second coat - don't worry, it didn't dry like this! I'll snap a close pic of the hinges later
I removed and sprayed the second half of the hinge as well, thought it would look funny otherwise:
It looks good from a distance, but not very pleased with the up-close look...I think I will drop them off at line-x when a good week of weather rolls around (so I can not worry about having to throw the doors back on if bad weather rolls in.
And just because it has never had its doors off before, took a picture of it
Make your life easier by coating the hinge posts with lithium grease...two of mine were a BEAR to remove. Should be easier the next time around.