I'd appreciate a bit of fault finding advice please chaps.
A spot of background: not been using the car a huge amount over the winter, but have been using it a reasonable amount over the last few weeks. Always park up in gear, handbrake off to prevent calipers seizing.
Anyway, had a run last night (15 miles or so), first after a few days, no problem.
Drove to first site today (10 miles or so), all fine.
About an hour and a half later, drove to second site, noticed an acrid smell a couple of times so suspicions were aroused. When I parked up (3 miles?) the rear o/s wheel was so hot I couldn't get near it, lots of smoke pouring off it, acrid smell
I assumed the brakes were binding somehow, but too hot to do anything, so left in gear with h/b off.
Came back to the car an hour or so later. Car rolls fine, so brakes not binding. Drive a mile to next site, no problems.
After I have finished there, I removed the wheel to inspect.
Inside of wheel looks like a bin bag has melted on it, and then realisation dawns that it is the paint on the inside of the wheel (black) - it has blistered and pretty much come straight off
Again, hub turns freely, with just the normal amount of drag you would expect. Pads and discs look OK.
Can't see anything *except* what looks like a tiny weep from something on the back of the caliper. Brake fluid level fine though. CV boot clean and dry. Greasy/oily residue on inside sidewall of tyre
Wiped off as much of the bubbled/flaked paint as I could with turps, refitted wheel, on to next site (3-4 miles, no problem), and home (8 miles). No extreme heat from wheel (disc possibly slightly warmer than on n/s, but could still touch it for a second without burning).
As simple as a sticking caliper, making the wheel so hot that the paint melted, but has freed off now? Slight weep coincidental?
Or, did fluid leak blister and damage paint (only to the back of the wheel), but then why did it get so hot, and only on the one short journey?
Or, sticking caliper heats up wheel, melts grease in wheel bearing which coats tyre?
Couple of picture (excuse my thumb in the first