Detailing And Custom Zips Or Others Help

[suspence411]

i chose this forum because it seems to really get results. anyway, i have the silver 911 zip, and i want to paint it a couple of different colors. my problem is this, do i need to sand and use primer? or should i do that anyway? im using krylon gloss. and what would be the best way to mask the project? masking tape or frisket? im not sure, i tried both on hotwheels to get an idea, but niether turned out anywhere near what i had hoped. i think its because i didnt sand or prime. if someone could tell me how to do this well, i would really appreciate it. im not really a mini rc fanatic, but i would like to have a dope car. i also got the F and F kit, so if my porsche turns out well, i might have a couple of whips to show. i have some really nice paint schemes. i think you guys would like. very original (i think). also i read a porst somewhere on this site that someone had created their own colors using a MAC program, i would be interested in that too. well thanks reading. any help is appreciated. and if anyone out there would be interested, im a dj, and i make mix tapes and cd's. full of hip hop, reggae, rock, more hip hop, and just about anything else that sounds good, (similar to Z-TRIP).
PLEASE HELP.