89 3100 hatches - advice?

[rose_surfer]

A previous owner of my 3100 sealed all three hatches closed with silicone. I'd really like to be able to use them, so I'm considering cutting the silicone out. However I'm guessing the owner sealed them for a reason. From searching this forum, it looks like these were custom for this boat, so I'm afraid if they are damage, or I damage them unsticking them, I'm in real trouble.

Any advise? Should I try to unstick them? I figure I can probably at least find o rings somewhere if I need to replace those.