You have progressed a bit further than last time I talked to you mate 

I think Nino covered it in a thread awhile ago, although I may be wrong, he could have been doing pop bumpers, anyway, he had some frisket material in the different size rings, one to cover, one to outline then used a airbrush to paint.  That would be the ideal way to do it.

If you are going to use the ones you have now, i'd cut right up to the black area or it will really stand out once cleared

If you decide to use vinyl cut give Greg (oldpins) a PM he will definately be able to help you out.  Vinyl cut is very thin and should ok with clear over them, but they could be very fiddly to apply.