A polish is supposed to remove the fine scratches, something you can't really do by hand. If a towel is all you have then I guess that works.
After you're done with polishing you can wipe down the car with a solution of rubbing alcohol and water, to remove the oils left by the polish. I didn't do this because I use a spray on wax which I can apply as often as I wash the z. But for most people, they will wax the car a couple times a year and they want the wax to stick.
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2010 k23
H&R sport springs / Spc rear camber arms / SSR SP1 / Berk cbe / Varis cf lip / Nismo S-Tune side skirts
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