So it looks my reply of yesterday did not make it to the forum,

First of all Ikarma, there is no need to apologize, maybe it's because I did not explained it correctly. I'm here to learn and with some luck get this fine pistol to be in working order again so I can go an get a "go" with it at our local shooting club.

I do understand that it's old and that people are more interested in more modern ways of loading than using a fire extinguisher, but he did we all not started that way. Some of my other guns are old as well one is a Browning Medalist (1967) the other one a Browning International II (1973) and both off them shoot well and are still very accurate even at 25m.
But I would like to make the test another 40 years down the road (if I can keep up that long) with a more modern let's say S&W MP22 made of polymer and an aluminum slide, will it still be as good as my oldies?
http://users.telenet.be/vanbeeumen/Guns/FN.jpg

Hence the reason why I will stick to this Steyr LP5, and there is no reason for me to sell this especially not if "there a limited market and you would be lucky to get £250". I would rather see it converted to compressed air, and enjoy the shooting with it for quite some years to come.

Yana, If you could fine me some insights how to work the fire extinguisher for the time being I really appreciate.

BR