I guess it would be classed as SI if you did it on purpose but (and I don't know if this is appropriate or not) it's good that you have found a release that doesn't leave scars or could be unsafe to your health . I don't really know what else to say, but if you MUST SI then better to go with the hot wax than anything else. I've been holding icecubes recently and they've been quite effective. Good luck!