Glad you like it Dunk
For the record the Chemical Guy's wheel cleaner isn't acid, its a very strong detergent and very slightly alkaline, totally wheel safe and when cut 3:1 with water even safer.
I have used this cleaner on all sorts of rims (porsche split, Lambo splits and many many more) never having a prob.
The brush is a Meguires spoke brush and again totally wheel safe, it doesn't mark, scratch or do anything to wheels, so no worries there:)
On sealant, yes a coat or two would help protect rims, the poorboy's mentioned is a good one, but not the only one out there, other options are Klasse SG sealant, Rim Wax and Chemical Guy's new Wheel Guard, I have all and have used then all too, so far in my testing the Poorboys is a close 2nd, but i'll leave it there

Any wheel sealant won't stop brake dust sticking it just helps to reduce it happening so quickly, while also enhancing the look and finish.