I just purchased a 2015 model Pioneer 500 from a local dealer left over from last year's stock. I noticed a few small minor areas where surface rust showed and the dealer sprayed a black rust proof paint over those areas. Once I got it home and got more familiar with the vehicle I noticed more surface rust on the shaft (see picture). Should I be concerned? It's under 1 year Honda warranty. Dealer said it would splash off once I introduce it to mud and wouldn't be anything to worry about. Any thoughts?