The FLTA (fork lift truck association) have came up with a fear wear and tear guide booklet, i think it was based on the booklets used by Barlow World, they had separate books for light and medium use. I think it is a good idea but doesn't really cover paintwork in much detail. I think most companies would expect a certain amount of paint damage.

If the booklet is issued at the start of the hire at least he knows where he stands if the truck does get damaged.