The engraver, who is very rarely the designer, then cuts the otitlines into the block with a knife, afterwards removing the superfluous wood with gouges and chisels.
The implements of the Bronze Age include swords, awls, knives, gouges, hammers, daggers and arrow-heads.
If the floors are heavily damaged and you need to sand out deep scratches, gouges and dings, grab a sheet or two of 60 or 80 grit.
Even if you have a scratch-resistant coating on your lenses, you can avoid creating deep gouges that coatings can't stand up against by keeping them in a case, whether it's just a soft pouch or a hard clamshell case.
Wear to the arms and seat is to be expected but look for deep scratches and gouges that will need extensive repair.