Angle grinder for cleaning, polishing (tiles, taps)

I have a really grotty wall that needs to be cleaned and polished. I'm planning to buy an angle grinder and use that for cleaning the bathroom walls (and for wood work - garden and metal cutting).

What fitting should I use with the Makita 9558NB - 500W continuous.
http://www.makita.nl/images/files/onderdelen/nl/9558NB-TE.pd
(this isn't variable speed - it's 11K RPM - do I absolutely have to get another tool? Basically I'm trying to avoid buying multiple angle grinders since my needs are many and varied but my hours are few)

I don't want to use a wire brush - it'll scratch the tiles. Wrapping the brush in a blanket and rotating will apply an unbalanced force which iI'm not dead keen on doing.

Basically I have a *lot* of surfaces that could use a good cleaning - some - taps will require a wire brush. But what about floor, ceramic fittings. I'd also like to make the tiles a little shiny.
What's the best tool for the job?
http://imgur.com/c2KB6mn

get one of the big ones,,,,a 7.5 '' grinder not a weak little 4.5...

get after it man....get er done !!!!!!!!!!!!!!!!!!

oh boy.. i lost my post so this is a shorter version.

Sounds dangerous - what bit should I use (accessory) even with a wire brush.. at 1HP and weighing 5kg, held against a vertical wall sounds dangerous I could/will loose my toes. At least this way, i'll have only 2kg falling on them.

LOVE POTION #9-

I have seen this product advertised- http://zapdoubleoffer.com/?c=psearchzapdoubleoffer41&gclid=COCZpqfJi8wCFcRahgodveYODw

Have no idea of how effective it is. But I would try it before taking a grinder to tile. Maybe this will also keep you from having to re-grout.

If you decide to go this route, please let us know how it turns out.

Get an orbital variable speed polisher like auto detailers use. Very controllable, will work with various grades of polish, can make gloss on dull surfaces, and will accept different grades of scotchbrite and wet/dry papers. Safe on flat sufaces with minimal edge-digging.