i used the roof sealer with the fibres in it already... did 3 coats of the stuff. I then did 2 coats of high gloss enamel, the kind u use in bathrooms.
The end result is a bit "ruff", but it seems quite strong. I havent done the inside, it's still just clean styrofoam. didnt want to start until i had the lid sorted. The problem is u change the space inside if u just ad stuff inside the lid. (the lid is hollow that adds extra space).
I'll take a pic tonight and put it on tomorrow morning.
P.S. it's not a masterpiece, i failed art at school.