Has anyone removed mylar with Freon?

I am a refrigeration technician. Canned air is r-134a.

Just like in a refrigerant cylinder, when you turn it upside down you are drawing liquid refrigerant from the can.
I only ask if anyone has gone directly to the Freon because there are many types.
One may work better than r-134a.

Yeah. I get the 134 in 30lb cans.
I said Freon because that is how most people refer to it rather than R-XXX or refrigerant.
Just like Kleenex is tissue, Q-tip is a cotton swab and so on.

I also get R-404 and many others that have varied boiling points.
Some are lower and couple are higher.

I will try several and report back.
I have a high speed mylar removal coming up.

R-22 runs almost double the head pressure ( high side ).
R-12 ran about 100 to 150 psi on the high side depending on ambient temp and load.
R-22 runs 200 to 275 head pressure.

R-12 is still available but too expensive.
For autos R-416A is a nice substitute and I have had great results.
Other gases are not compatible with the seals and will degrade them.

R-134A is the refrigerant used in automobiles now and was designed to mimic R-12.
You have to change the oil to use R-134A in an R-12 system and the capacity is a little less.
In an old car it is unlikely the seals will survive with R-134A and its oil.

R-404 is an inexpensive gas and boils at -46*F.
R-134A boils at -26*F.
I plan on trying both.

ChloroFlourocarbon refrigerants and Hydroflourocarbon refrigerants are harmful if inhaled.
They also displace oxygen in an enclosed space.
They are dangerous and using them to remove mylar by untrained personnel could be fatal.

I have been in the trade for 25 years. You are exposed to it a couple of times a week at least.
The amount you would be exposed to from air in a can or from careful use of refrigerant done in a well ventilated space would be minimal. Always work on a bench or saw horse. Refrigerant is heavier than air. It will flow off your work and to the floor. Your head is another 2 ft above that work.

I have been in walk in coolers and freezers where dry ice was in use. I would rather use refrigerant.

Yes it is.
And, I am fully trained and licensed.

The fact of the matter is, that if you are in the trade you will be exposed to it.
Generally, we are all exposed to it from time to time.

Did any of the evaporators in those autos ever leak?
With the windows closed the occupants of that auto were exposed.

If someone's central air conditioning has a leak in the evaporator are the occupants of that house not exposed?
Restaurants, shopping malls, processing plants, any place that has air conditioning or refrigeration will have refrigerant floating around at some point.

We are subjected to all kinds of chemicals today whether we know it or not.

R-404 is $5.75 per pound.
I would guess it would take way less than a pound to strip a playfield.

I do not wish to create a problem.
You are correct sir.

Let's count thumbs up and thumbs down

I tried the heat method and was pulling paint up off the playfield on my high speed. Right down to bare wood.
I tried some hot shot R-414b refrigerant and the Mylar peeled off so easy it was awesome.
Takes very little refrigerant and you are done in 10 minutes. Paint, insert art all intact.
Should only be done this way by hvac/r tech's familiar with handling refrigerant.