I wasn't so keen to throw out such a handy bucket and so we had a bit of a think and here's what we did...
Green-ness: 5/5 for fixing and not throwing a bucket out!
Frugal-ness: 5/5 for a free fix.
Time cost: A few minutes to get the patch in and stuck. 24 hours to set.
Skill level: Cutting and pasting - like most of my projects!