First tip: we call them “hoods”. As in “drop the hood and get to welding”
A welding mask to me is one of those handheld jobbies my instructor used to use back in welding school. Think clipboard on a stick with a very dark piece of glass over a cutout in the middle.
Old “welding hoods” are literally that. A big leather hood that goes over your whole head with a little fixture to hold the welding lens over your face like snow goggles. They still make this style today for real heavy welding applications
That would be the wrong approach. First big problem is that cops or anyone else can wear gloves. Second, you aren’t really trying to prove who owned the drugs. You would be interested in proving that the space in which the drugs were found previously did not contain the drugs before the cops “found” them. That’s why bodycams are super important. Most evidence tampering cases boil down to “spot was clearly empty before cop mysteriously produces drugs from the same spot”