Thanks everyone for the help I was able to get the piston out using a screw. Here's a photo of the damage and a unscathed shock. New piston and oil on order (plus a new shock just incase) so should be back together soon. Thanks for the help everyone lesson learned.
That's great news and cool trick with the screw
BTW, is it corrosion or pitting behind the front seal in this pic or just smudge?
Thing is, since my very first Seac Hunter, I have not been fond of these types of pistons. When I took that gun apart after my first spearing trip, I had corrosion in that exact spot. It's almost like it migrates from the front, under the o-ring and to the back. I know Pete's says he has used these pistons for decades and haven't had real world issues with it so I am probably just overly cautious;-)