Registered Forum User
Big Twin
Posts: 1,670
Join Date: Dec 2003
Location: Brick Lane Curry House
Mood: suck, squeeze, bang,......fart?
"Gunk" is actually quite good for that!
It's a degreaser. Decant into one of those plant sprayers you can buy from garden centres, spray liberally, leave for a bit, agitate with an old paintbrush then hose off with water.