Ah thanks ladies! Sap makes sense because it did feel a bit slimy and weird, lazy me didn't think to wash it off til it was too late. I normally buy butternut pumpkin so have never really noticed it before. My hands have a noice green tinge to them now and I can sort of peel the dry bits off!
Righteo off to eat my pumpkin soup and roast vegies......mmmmmmmmmm