This will only work if you do it before you assemble the wheel. Take the bare rim; mask off with several layers of masking tape the parts you do not want to paint and then lightly grit blast the centre. Use a blast medium that will not cause any damage, possibly crushed walnut shells or whatever. Just enough to rough up the polished chrome or polished stainless steel. Two pack paint is tough and polyurethane is abrasion resistant. If it is well masked up you can either brush paint or use a spray gun. Paint but do not line yet. You might be able to leave the masking tape in situ if you have used a good non bleed one, and assemble wheel. The easiest way to do the lines is to buy or borrow one of those lining pens, I have forgotten the manufacturers name. Then you can spin the wheel on its spindle and hold the lining pen as it turns. Black centres and red lines were original on all the newish ones I remember from years ago. Finally remove the masking tape. The red line can go over the black paint if you want something to key it to. Good luck with it.