Originally Posted by Kubicki's right boot
Aye I guessed the gist of how they might do it, do they use a bucket of watta though like on a bike tyre?
Actually a lot of places do that yes. More of a paddling pool than a bucket.
Can also recommend Peacocks, used them a fair few times over the years. If it isn't too far gone you'll be looking at a tenner patched up.