Double-sided Gaffa

Among all the variations - here is a really simple one:
Stick the edge to some round object, then roll it sticky side outwards. Cut off, pull off. There you go.
Some object to roll the gaffa on, depending on the diameter.
Stick the edge just a small bit onto it.
Start rolling backwards.
Cut off after it begins to overlap.
Pull it off.
Cut in smaller pieces if needed.
To apply it at more complicated accessible spots, you've got the perfect tool for that right in your hands.