new 2 the site boost gauge

[Mike]

What grade sand paper would U use and what's the best primer and paint, its gotta b durable on alloys ain't it mate

If the alloys have bubbled/oxidized, you will have to take the paint right the way back to alloy (80 disc is useful). or get them sandblasted.
Then work your way up the grades (80 > 180 > 320 > quick 500) to get all the deep scratches out from the 80 and to make the alloys smooth.
Blow them off an panel wipe. mask up. blow and panel wipe again. and let spraying happan!
Hope this helps or gives you an idea anyway.