Paint and folding locks

Some ba*?!* at work seems to slam his folding lock at my grizl. It started with some chipped paint and now I can see the aluminium through the paint. First I thought it might be my assembly stand, but it’s getting worse and worse and new scratches appear day after day. The problem is, when I start at work, no other bike is there and when I finish It’s the same.

Do have any tip to patch the paint and primer?