Brake cleaner & welding
I did 12 years of welding in my little county parks shop, MIG and stick mostly. Here's my advice. Had a BIG fan at the rear of the shop it pulled a draft from the roll up door to the rear wall. Then had a commercial fume evacuator with a 4" vacuum hose and magnetically mounted intake nozzle to attach near the work site. Used CO2 as flux gas for most steel, it's cheaper, mostly non-toxic and it's much denser than Argon, Argon/CO2 or Helium/Argon/Oxygen mixes, so it's also quieter, allows deeper penetration and faster surface speeds. That little arc on a MIG box running .35" dia. wire produces 90-94 decibels, above the OSHA action level for 4 hour exposures even with the CO2. In fact, the arc beat the Do-All band saw cutting 6" square tube by 2-4 decibels You should wear earplugs when welding for extended periods.
Ran a lot of hard facing electrodes and Stellite flux core MIG wire for dozer grousers, moldboards and backhoe buckets. When using any of these toxic alloys you should also wear a NIOSH approved mask under the hood. That's in addition to the ventilation equipment, or work outdoors. When outdoors a fan placed to blow the fumes away from the work area is good insurance. Cobalt is a lung poison, while chromium and nickel aren't good either.
Same for welding cast iron with nickel electrodes. Stainless steel required one of the commercial shielding gas mixes Helium/Argon/Oxygen, the stainless steel itself has chromium and nickel alloy. Wear the respirator rated for metal fumes, it should also have an activated carbon component.
Your welding hood is a fume collector that concentrates nasty stuff right on top your nose and mouth. If you got a black smudge under your nostrils at the end of the day - you are in danger.
I used Berryman Chemtool for years to remove rolling lube on square steel tubing with no adverse effects, but everything was wiped dry and the rags stored away from the area. Some aerosol cans are powdered by propane and the stuff itself is flammable - if everything isn't dry and the vapor evacuated - boom!
Welding is potentially dangerous, even my mother had metal fume fever while welding in the shipyard - knowledge is the best safety device.