My roof was struck with this similar problem. It has been a year since the fix and currently no rust bubbles on roof. Just that there are crack marks in one area of the roof which I think could be due to the poor paint job....Wira got many batches got this problem, that is why it is well known problem. Some even cut the top and import in as replacement
RM4k increment across all variants? But this could also due to our drop in RM value. The time during HRV's launch last year, RM value is not that bad yet.Only after they increase 4K price... :)