I still use the stock bulbs, just painted the out side black so there is absolutely no orange or red showing thru, unless the lights are on. even then, they only really show when its dark. The stock bulbs are bright enough to shine thru, depending on how many coats you apply...

Do a search for TRK and look at his lights, he used the nightvisions tint spray your talking about, IMO they look better completely black, but look at his and make your own decision. since your doing your car.:D