Whilst clearing my late grandfather-in-law's garage, I found a half full tin of Gunk.
Original, proper, take the skin off the inside of your nostrils Gunk.
From a time before there was too much concern about the use of chemicals in these products...
Looking forward to giving the engine a once over with it for my rebuild... Awesome stuff if you can get hold of the original formulation.
Do not buy the modern equivalent as it is nowhere near as good.
Slidey