A dull tool requires more pressure to make it operate properly. The more pressure you exert, the less control you have. You use muscles to stop movement, as well as start it. Small, light muscle movements are easier to stop than large, forceful ones. That is what makes a dull tool more dangerous than a sharp one. Plus a dull tool will lose it's bite & slip. Combine this with excessive force, you can get in trouble.
You can't beat a good pair of needle nose vice grips for getting in tight areas with a razor blade. I've been using that trick for decades, it works on everything.
I don't know how handy Torrean is with tools, I sure wouldn't want to be responsible for telling someone to do something that would lead to some stitches or severed fingers. I climb under machines holding a razor blade in my mouth a couple of times a day, I wouldn't suggest this to someone I don't know. Start with the safe way first, unless you like being called "Lefty".
Tolak