As I have recently touched up the paint on the Orion's alloys where it had got scuffed and chipped,I was interested in a tip that was in Practical Caravan this month.
A chap had affixed some non-slip matting to the rear of the Al-Ko wheel lock to stop it scraping on the wheel.
He had cut a section all in one piece but I thought this would be rather difficult and not fit very well so I took a sheet of non-slip and cut out a section for each of the flat areas on the back of the lock and stuck them all on separately with Evo-Stick and let them dry.
It seems to work rather well.
The lock still fits into the wheel and the non-slip protects the alloy.
The non-slip matting can be bought from the pound shop for err.... well ..................a pound.
Other outlets are available.