You should be able buff them out with some compound polish - any 'polish' should have an element of cutting in it. But I'd see how much they disappear with just some wax first, if they are still visible take the wax back off with washing up liquid then buff with an orbital polisher. Don't wash them with a grit filled sponge either, clean wash mitt, and a grit guard in the bucket of clean water. Never use a sponge for cleaning paintwork or polished wheels like those. NIce rims.