PSA for Welders - Brake Cleaner = Phosgene Gas

Better to just avoid all brake cleaners for cleaning surfaces to be welded. I use acetone myself, much safer and does an excellent job of de greasing.

WOW I deal with phosgene gas quite a bit in my line of work

I have learned over the years to allow the residual refrigerant to bleed off before soldering up refrigerant lines but sometimes it's unavoidable

So I take deep side breathes out of the phosgene zone and hold it as long as I can to get the job done

In your case, a resperator with the correct filters would be a VERY good idea.