Wow he is very lucky he did not bleed to death. Any shot still in his leg? I know my old bird dog had his fair of 7 1/2. He had a nack of springing for low flying qual.
smallfry

Gasoline is NOT a solvent. Gasoline fumes drop to the ground -- which is usually where the pilot light flames are . . . or heating elements. Seems obvious, but lawn mowers need to be fueled up out in the yard, not in the garage. Kerosene or mineral spirits for solvent (paint thinner).

All the bluing chemicals are caustic.

Acetone disolves the materials in a lot of protective gloves. I used acetone to degrease parts before bluing. Some glove mfgs are listing optimal materials in gloves for handling certain types of solvents.

Furniture strippers. I used "Jax" on some stocks and got it on my exposed skin. It's water soluable . . . how nasty can it be??? Actually it's very caustic and I got a significant chemical burn on the exposed skin. What a surprise.

Lead . . . we all handle lead. I wear surgical gloves these days.

All reloading guides warn against eating / drinking while reloading. Lead and powder gets on your fingers, then into the food supply and you ingest it. Bad news.

Powder is, of course, nitrogylcerine or nitrocellulose. I don't worry about breathing it, but I worry about ingesting it. No eating while reloading. Wash your hands!!!

Black powder smoke is really toxic on a lot of levels. I like the smell of it, and it's easy to take a pretty good "hit" as you disappear into a cloud of smoke on the back end of a muzzle loader. I'm learning not to breathe this stuff.

"Captured" springs . . . and the objects they propell . . . firing pins, hammers, etc. These days I place a white towel in the bottom of a five gallon plastic bucket, then I work with the part inside the bucket and, if possible drape another towel over the top of the bucket. This has caught a lot of flying parts for me.

Felt and cotton dust on polishing wheels easy to inhale. Use a mask. Same for "stone" wheels. I have wires from wire wheels come loose and stick in my clothing all the time. I invested in a full face shield for this work, and a respiratory mask.

While we're at the grinding/polishing bench . . . If it spins, ensure that your clothing, hair, jewelry, etc. is not going to get caught up in the spinning parts. Lathes, drills, Dremel tools, etc.

We all know about NOT using a vaccuum to clean up spilled powder, right???

Rags soaked with oil and solvent can generate heat and cause spontaneous combustion. Oily rags should be soaked in water and discarded properly. A metal bucket with a an airtight lid is a good place for them.