blitz kit question

My friend just sold me his blitz front bumper for my car .... but its not the right color which isn't a problem ... but is their a certain way or process you have to go through before you paint it besides sanding it and priming it .... like a certain type of sand paper , etc any tips would be appreciated ... never fulled with any type of kit before.

thoughmuch cheaper, i wouldnt attempt to do that myself, i suggest u get it professionally done.

well its almost done now .... already got it sanded down....i used 180 grit then used 240 to finish it off .... im buying the primer and paint and a friend is painting it for me so hope it turns out good

if you can..post some pics up of the finish product!