Skimming brake discs

[lolsteve]

So we know of skimming the head for headgaskets but what about discs?
I've held onto my old Mintex discs as I only removed them due to a bit of warping but seeing as they still have alot of life in them it seems a waste to throw away. Someone on fb mentioned to me about having the discs skimmed which resulted in this http://www.skimmydiscs.co.uk/

Anyone tried it before? For smaller brakes I imagine it's just cheaper to get new discs but might be worth trying also my ebc discs too at a latter date