This all sounds to familiar. Jeweler mind you, not engraving was where I
got my experience from. I no longer ever allow customers to hang over me
like vultures. It may seem innocent, but don't be fooled. They can turn into
ax murders very quickly.
You may think your good at multi tasking until the buff catches the piece and
turns it into golden confetti. I learned this the hard way. I would suggest
everyone with only a couple of years under their belt, avoid doing this at
all cost. You are guaranteed to regret it.
Jim