i am currently restoring a set of work equip roundspokes (3 piece) and i would like bit of advice

i have removed 90% of the factory powder coat using paint stripper and i have polished the lips of all four wheels using a brake lathe and hours of wet sanding.

i was thinking of sandblasting the centres clean then painting or powder coating the centres flat,satin or matte black. i would prefer not to dis assemble the rims
any tips on painting wheels at all? or prepping for that matter?