I've seen several threads discussing removing vac decals and cleaning them with different products, but would like to know if you know how to polish a vac. The brushed stainless verses the polished mirror like finish. Is this practical? Or doable in the field? In south Florida the brushed ones dull up after a few years and start to corrode. Not like rust, but you get small spots that multiply. I went to a place that I sold polished finish vacs over 10 years ago, and they still look great. Any suggestions?