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Oak Bowl w/ Reishi mushroom
(lemmy.world)
Part of a larger project I’m working on, which takes the “waste sawdust” and grows a Reishi mushroom out of it.
Much easier to find a new piece of steel to use.
Like someone said above- the amount of heat required to fill those holes will most definitely warp your steel.
You could grind down any burr on the holes and let it be with the holes. Not sure if that would still suffice for your requirements though.