Guys, I've got an email reply from a personnel working at Rays Wheels (Japan). This is how it goes:
Hi Zey,
Thanks for your mail.
Please wash your wheels using water & mild soap only. Please do NOT use any
commercial cleaners or waxes which include "compound materials". That is all
you need to maintain your wheels.
Best regards,
Kenji
From the above reply, can I still use EO A2Z? The reason I ask this is because at the back of the wheel, the surface is too rough, I'm pretty sure lotsa dirt will be trapped there. I intend to use sponge to apply the A2Z instead of letting it to soak on the surface. As for drying, I think using a cloth to dab-dry would be better else the rough surface will trap lotsa cloth lint. What do you think? Thanks!