Mr.gurneyeagle, sorry to hear about all those incidents happened to your Z... I think it is a good idea to swap back to the OEM spring thus more peace of mind on your upcoming driving!
Drove my Z to work today, and parked it outdoor for the whole afternoon and when I finished work I went up to her and saw the horrible thing again.....
Those cutie seagulls always flying with their heavy diarrhoea symptom left a decent amount of "souvenirs" on my Z...
Anyway, driving home so pi$$ed and went to coin wash and spray everything off the panels and removed those spots after got home.