[Shop-talk] aerosol cans

[Tim .]

I have a bunch of cans, PB blaster, WD40, etc that have lost their pressure
but are not empty; a couple are close to half full. (I left these two in them
garage shop over winter <insert embarrassed emoticon here>)

I am wondering if anyone has punched open cans in this condition to salvage
the rest of the penetrant/contents? If so, what has been done or recommended?
Or should I not even mess with it?

I have a seized block I'd love to use these cans' contents on....

thanks
tim