So far, I would suggest at least not touching the liquid chemical, nor touching a rag wet with it. Skin contact with benzene is probably the major risk, if anything is.
Depends on how much, but generally yes. Benzene is one of the few things that is basically unavoidable in everyday life, but even smallest relative quantities of which is expected to linearly increase mortality. Benzene is naturally found in gasoline, as a byproduct of most combustion, etc. IIRC, benzene one of the most harmful chemicals in cigarette smoke, and the reason ‘second-hand smoking’ is considered such a big problem.
Most of the MSDS warnings here seem to deal with the hazards of the LP propellant, which is typical of all aerosol cans. MSDS sheets are often excessively cautious, warning of any known risk, no matter how small.
P280: Wear protective gloves and eye protection.
This is the one line of the MSDS that gives me some cause for concern. Skin contact with benzene is very likely what this line is about.
So at least avoid that.