one quick primer question

okay, when i got my model i had no idea about painting models the righ way. i am learning a bit more as i go. when i first got it, i sprayed it with some enamel paint. then i realized i should use primer and stuff so i sanded off alot of it. then when it was mostly sanded i primed it. then the primer coat of painted cracked up in some spots. so i sanded out those spots and sanded much of the primer smooth again, using 400 grit. anyway, now i am looking at it and its three different colors, white(plastic), black(paint) and grey(primer). so now do i prime it again and paint it or do i clean it p a bit and paint it now? i want a really shiny smooth paint job:D

I would recommend you strip completely and start again from bare plastic.

You can strip enamel paint off with Castrol Super Clean degreaser.

I would also recommend you read the FAQ to see all the info on painting already there.

Try using 1200 gritt thats wat I use mostly