On Tuesday, February 7, 2017 at 4:43:14 PM UTC-8, Doug Miller wrote:
woodchucker wrote in news:GaudnZv5WLN9pAfFnZ2dnUU7-
:

Once caution about carb cleaner. or brake cleaner.
if you weld, never use either.

Repeat: IF YOU WELD, NEVER USE EITHER.

if there is any trace of liquid (doubtful long term) but still a
possibility ... Phosgene, I think. Anyway, it's a *nasty* *******.

The cleaner component that causes problems is carbon tetrachloride/perchlorethylene/methylene chloride and such.
Those are VOLATILE compounds, with warnings to only use with good ventilation,
and a day after applying them, they aren't on the apparatus.

You should also only weld with good ventilation. Ozone is nasty, too. And NO2, and so on.