Not made, but after explaining to a colleague who has moved to Norfolk

, how I restore the various blacked bolts on our Pro PA Speakers, he asked if I could do some for him as he wasnt confident in tackling it! I agreed, expecting 20 or so bolts, he sent this!
View attachment 962475
A bit more than my bench wire wheel is normally used for

A quick soak in Hydrochloric acid solution
View attachment 962478
And we get this
View attachment 962479
Rinsed in clean water
View attachment 962477 , then straight into the Koldblak tank
View attachment 962492
Then another rinse in water
View attachment 962494 before going into an overnight oil soak
Heres a before and after side by side, the rest are soaking in a half gallon of mineral 2 stroke oil for the night
