Not just the bolt holes, the small holes and spokes too by the look of it. As ours is coming up to five years old I don’t think we’ll stand any chance of further replacement so I’ll get ours done locally when they get much worse.
Here ya go Les this was last June they are slowly getting worse. I am parked up next to a 5 year old Burstner with the same wheels and what a sight they are with corrosion.Can you post picture of old wheels(sorry if you have already done so) as this may help others if they have a similar problem.
I have never owned a set of "Diamond Cut" wheels on any vehicle that has not suffered the same problem.
The slightest stone chip will allow moisture to penetrate the lacquer coating, I have seen so many wheels come out of refurbishers that have been sprayed in one colour as they know the lacquer is not going to hold up as long as the painted areas.
Congrats on your success in getting new replacements,it was well worth the effort & wait in the end, maybe you should do the lottery also tonight.
I think you'll find with yours it's the bit above them that you need to worry about