There are many ways to remove the protective film of stainless steel. Acetone can be used. The amount is small and thorough. The best thing is that it can remove these residual gums very quickly and easily, which is better than sprinkling. Or wipe it with a paper towel dipped in some alcohol, and rub the stainless steel protective film a few times to clean it.
You can also use nail polish remover to remove the stainless steel protective film. The usage is the same as alcohol and acetone, and the effect is very good. Nail polish remover does not require quality, good or ordinary ones are fine, as long as they can remove all nail polish. With hand cream, first tear off the printed products on the surface, and then squeeze some of the hand cream on it. Slowly rub it with your thumb. After rubbing for a while, you can rub off all the remaining glue on the stainless steel protective film. Just slow down. Hand cream is a kind of grease and its properties are incompatible with glues.
You can also use banana water, which is originally an industrial agent used to remove paint, and it is also easy to buy. The method is also the same as alcohol acetone. Use a hot towel, scrape with a razor blade, and erase the stainless steel protective film.