These links are specifically because Matt asked for them:
Firstly the fibre wheels for a bench grinder. I have bought 200mm and 150mm discs in the past. I think the higher numbers are the hardest compounds (P9 is harder than P5).
3"-12" inch Nylon Fiber Polishing Buffing Wheel Abrasive Pad for Metal 5P/7P/9P | eBay
Sometimes objects are not convenient to take to a bench grinder so for those occasions I use a 100mm disc on an angle grinder
4 Inch Nylon Fiber Polishing Buffing Wheel Pad Disc For Angle Grinder 5/10/20Pcs | eBay
I am not particularly recommending this seller one way or the other, although I have bought from them and been pleased with the purchase and you should do your own research for price and quantities. This link was the first I turned up located in Australia:
200mm Nylon Fiber Polishing Wheel Sanding Buffing Disc Abrasive 4894817021947 | eBay
This listing says each but it is each of five pieces :shrug:.
5x Nylon Fiber Wheel Abrasive Polishing Buffing Disc Pad Angle Grinder Practical | eBay
With the angle grinder packs a quantity of ten seems to be the most economical way without going for a truck load. Watch carefully to check what you are buying.
Regards
Paul