Have you used a pressure washer to clean wheels?
I have a small low power one and was wondering if it will damage the finish if used carefully from a 10" or so distance. (O/E sport wheels on an 06)

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BMWCCA # 12660
14 GLK 350 M/B (hatefull POS gone)
05 CLK 500 AMG Cabrio
07 530xiT
09 Boxster