The electrolysis machine I bought came with some insulated IBIS needles, sizes 1-4. Can the insulation be taken off?
The probes are polished to be very smooth and to make insetions and treatment more comfortable. Were you to try and scrape off the insulation, you’d be ruining that polish. It is easier to just get new probes.
But why would you not want the insulation? The insulation is there to add comfort and minimize skin reaction.