Spark plug drain holes

[darrsi]

Could try spraying a load of WD40 in that direction and see if it softens things up, at least it won't do any harm.

[Fazerider]

HSS bits of that length are hard to find.
I had a pack of extra long masonry bits which I’d bought ages ago in a poundshop. The shaft of the “6mm” one was 190mm long, but tungsten carbide head was too wide. So I just hacksawed that off and used a round needle file to deepen the flute at the tip.

[Trebus]

The metal inserts from traditional wiper blades also prove to be very useful and I always keep them when changing blades. Can be used as a good retrieval tool!

[TOM VR46]

Tried soaking in WD40 last night but still solid today. Think I had some old masonry drill bits. Will have to have a look. Was also thinking of cutting grove into steel pin ive got, and putting that into drill. But this will have to wait till the weekend again as im working nights.