Series 1 2 & 3
Big Landy Fan
A wire brush will clean the threads out a bit faster, but anything that will get the dirt out without removing any metal will be fine.
IME gunky-covered metal things are best washed/soaked in paraffin or diesel (I prefer paraffin, it is more "searching") for a day or two.
Most of the gunk will come off easily with a paint brush after a soaking.
IME gunky-covered metal things are best washed/soaked in paraffin or diesel (I prefer paraffin, it is more "searching") for a day or two.
Most of the gunk will come off easily with a paint brush after a soaking.