312mm is what I have on mine for comparison
POR 15 do dedicated caliper paint which I used. A bit involved as you need to do 3 preparation stages before the top coat goes on but VERY hard wearing, chip resistant and great finish.
I got mine from Frosts mail order, not sure of anywhere that sells POR 15 products in the shops.
In the past when I used Hammerite, I found it became very brittle and chipped easily......might have changed since those days though.
As above Smoothrite Silver.
Chris "the machine" Green.
2004 Audi A4 1.9tdi Sport Quattro Avant
I just done mine silver (315mm) with new drilled and grooved discs.
Looks very clean and fits in well.
IMO unless you have big brake conversion, drawing attention to small brakes with red/gold/yellow is not cool
2004 BEX 1.8T Silver Avant - RTECH Stage 1 Remap - 211Bhp/236ft Torque
TEIN Super Street Coilovers - BlueFlame Catback with 4'' Slashed/Rolled Tips
Pipercross AirFilter- RS6 18'' OEM's - 225.35.15 Falken 452
I fancied red but probz to small for red as already said, so I'm thinking silver
S-line A3 1.2 TFSI brilliant black