Meaning you get a big pot to a boil, add some cayenne, and ...
oh wait - LR.
I think he means to put it somewhere with no or very low light, plenty of circulation in clean water ... and let the bacterial turgor work all the detritus/etc/itself slowly out of the rock. Essentially provide a `clean' system so that the rock can lose any detritus/etc in it and work itself clean.
I'd doubt you'd run any substrate in it, likely certainly zero critters/fish/etc ... you want to let the rock quit accumulating stuff and have the bacteria work what's in there out.
Or so my take on what I've read of Bomber's methods is.
Unsure on whether one would skim the tank [maybe, probably doesn't hurt] ... but will also combat any algae/etc - as you're letting it eat out all it's food source, let nutrients essentially drop to just about zero.
Unsure on water changes too, almost suspecting that you might not want any [or many] ... but maybe that's from that thread that just resurfaced today :lol:
But I'm betting at least you'd want to siphon out whatever detritus came off the rock - why not IMO?