Came across this video for sharing

John Bolton

Cleantalker Veteran
That looks like pretty standard procedure, presumably using H2O2 but does not show any stop action.
 

Mark Roberts.

Solution World of Clean
My standrd reply - go on a course :smile: As you alluded, learning how to boost and stop the reactions is even more important, learn what soft acids do etc

There is another vid around with an even more impressive transformation, always hard to say how set up it is, I'd bet its fresh dye to make a good vid.
 
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