The spray from my rear wheel was sand blasting my trailer, to the point of removing the paint.
So I toyed with the idea of a bash plate out of aluminium or steel,but it would have to be painted and that too would be sand! blasted off!
In my usual manner I thought about it and looked around, to what was to hand, at the materials I had laying around...
And there it was a cheap and readily available material perfect for the job!!!
If you undertake this job I advise that you use a skilled mechanic and can not be held responsible for any negative consequences.