If you mask off the polished main sections you would only need to polish the thin flat bit again which wouldn't take too long. Here is how mine came up, but i havn't polished mine.

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1975 1310cc Street Mini Custom
1974 Leyland Mini daily driver
2008 Cooper S R55 Clubman

i dont know if it would work, but could you paint the spokes and then rub back the polished surfaces with emery paper and to a polish then clear coat the whole thing?

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1963 850 - laid up
1970 Morris mini K van - eating up the kms!