Yer mate just tape them up on the first try of spraying my rims a while ago now i didnt bother taping them up and when it was done it slipped like sh!t so had to regrind it as the paint sat in the grooves.
Prep wise yer thats about right , I did mine, with the same routine as above and it has,nt come off yet
Theres a few qualified spray painters on the forum i,m sure they,ll give you sound advice when they come accross the topic