moblie alloy refurbishers

[nick.]

Hi everyone got a few scuffs on a couple of my alloys. Just a bit waery on getting a decent colour match on the anthercite.
Just having a browse round and found these,
http://www.wickedwheels.co.uk/index.html

Just woundering has anyone used these before, becuase they sound reasonable.
Or any recommendatons on who to have or advice.
Thanks
Nick