I love a good challenge this is really beatable but dental-tool micropoint rasping seems busy work for sure.
I have a chem cheat in the sleeve. not literally as the burn would req hospital treatment

but the truth is 35% was made for this type of wresting
it'll take all year to rasp it though if deep, your growback will be fractional for sure, worth it.
But if you take on the heinous personal safety risk which is securing 35% peroxide from any common healthfood store, in the refrigerator section, where they sell a chemical that people in Europe are not allowed to possess at this %, nor receive by mail, etc
well then you have the cheat of the year. 35% is all Ill use.
all the peroxide work we log online is 3%. Its safe to use, when someone spills it all over the cabinet, the floor and their legs its harmless.
when someone spills 35% the cabinet bubbles, your clothes turn white if they're colored, and your skin tingles for five hours but its only an illusion it w subside. there's a price to pay for spilling 35%
this stuff is what the danger symbol on the wall in a lab is for
I haven't used 3% in my tank in years, because ive no time for messing around with invaders.
it does not cause recycling, peroxide in any concentration we can access doesn't recycle rocks that's a huge misnomer in reefing and we're free to use 35% without killing your system as I spill it on my brain coral sometimes and it still doesn't die. you can be more careful than that. I have youtube videos of me putting 35% into my old reef without even removing rocks, im squirting in my reef, amazingly reefs are tolerant of it if we're careful. no other surface is other than glass, plastics. neutral there.
the 35% is only a risk to two things involving reefing:
-your eye
-a child's eye.
that's it.
its not a tank killer. Its the liquid lawnmower of the year in a bottle, but its a blinding agent Id choose bleach in my eye before this stuff wear glasses.
store it wherever you'd safely store a blinding agent, and dispose of it as a fine drain cleaner when you're done dont even keep it in the home around children unless its guarded by some kind of electrical field/laser cross beam alarm classic setup.