Ok, well I can share my "method" with you, which I have refined through MUCH trial and error. //content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif Here are the steps I used:
(1) Sand peice with a 300-grit paper
(2) Wet sand with a 500-grit paper
(3) Apply 1 coat of Duplicolor adhesion promoter
(4) Paint with your desired color. Now, if you just using black, you can use Duplicolor Black Acrylic Enamel, and be done. BUT, if you are using a different color, it gets quite hairy...
(5) Once paint has cured, perform a 1000-grit wetsand
(6) Paint peice with one medium coat of Duplicolor Crystal Clear Acrylic enamel
(7) Wait 30mins
(8) Apply final wetcoat of DCCAE.
...another thing as that, and I cannot stress this enough, KEEP THE PEICE OUT OF THE SUN UNTIL FULLY CURED. Also, make sure you do this on a dry, warm day. Humidity will ruin the peice big time.
Now, for the crack, I would recommend using Rigid Two-Parts PLastic Repair Epoxy. Body filler will pull away from plastic peices over time, this stuff will not. Patch the crack, then sand. Prime the section with Duplicolor Filler Primer (FP101) to fill any holes or sanding marks. Then repeat the steps above.
Just TAKE YOUR TIME. If anything goes wrong, just take a quick 10 minute break and remember, you can always sand it and start all over again. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif