Who did you speak with that told u to apply to plastics without adhesion promoter. Highly doubt that was eric, i talke to him 3-4 times hetting ready to spray my stuff and everytime we talked about my mce fenders he preached the adhesion promoter. And you say you didnt use mek the first time you applied, because you've painted before without it. IT SAYS IT AT LEAST 4X in the directions to wipe with mek, before sanding and after. You say the rusty areas that you didnt prep are sticking fine but other areas peel? Im sure the rusty areas are or were rough, the liner had more surface, texture, grit, to stick to on the rusty spots which makes me think the surgace you scuffed (or didnt scuff) was too smooth. The mek helps remove grease and oils that you may not be able to see. Just because your jeep looked clean doesnt mean it was. Were you wearing gloves while you prepped? You could clean an area of grease and then touch it with your bare hands that contain natural oils and u have a dirty surface again. This might be stretching it but i know when i painted my frame i was ocd with wiping prepall and painting with gloves. I didnt want any adhesion issues.
"4 low, 2nd gear, skinny peddle on the right"
bought not built, broke, then rebuilt
you thought you had rust? http://www.jeepforum.com/forum/f22/w...rrior-1269820/