Ever got frustrated trying to get the backing off covering film?
Fed up of stabbing your thumb with the scalpel blade when trying to separate the layers?
Here's an easy trick - simply get two 3cm long pieces of sticky tape and stick one each side of a corner at 45deg to the sides so the pull is focussed on the corner - then just peel apart!
You can use Sellotape but the adhesive is a bit too strong if you want to use that bit of film, so I use masking tape.