I guess if you are only applying gel it's not invasive. I was trained in removal of dead/lifted nail plate prior to reconstruction. As you shouldn't apply the gel until the affected area is dealt with. I have also qualified in applying ingrown toenail braces under their gel. This allows me to practice insured fully and with 3 million dollars in liability. Becoming advanced Pedicurist is one of the better things I did for myself, even though I spent two years in college getting an Esthetic diploma. Education never hurt anyone.