Golf GTI Mk2 rear brake carrier

[bobbuild]

In the process of replacing the rear discs on an 8v Golf GTI Mk2. I've managed to do one side but the brake carrier bolts on the offside are absolutely solid. I've drowned them in WD40 and tried a bit of heat but they just will not budge. It feels as though the hex socket is starting to get a bit sloppy and I am worried that I may round them off if I use any more force. Anybody had a similar problem and if so how did you get round it? Any advice gratefully accepted!!

[Dr G]

Used a very small locking pipe wrench on mine, did get them out but destroyed the bolts in the process. Thread lock on the replacements!

Another known MK2 annoyance