Wow
wonder how much it would cost to deseam my mini cabriolet
Brilliant job
about £300 if you do it your self with a gasless MIG.
more like £500 if its gas (those bottles dont last long!)
Thats including cost of wire, and practice metal to get good at it.
I take it you mean the small bottles you buy from Halfrauds etc.
Go to your nearest B.O.C dealer and get either a plain CO2 bottle or a Argon/CO2 mix (preferable.) Its on a contract but if you are doing a lot of welding then this will be the way to go. As a rough guide i think its about £90 a year then you can get a refill for about £30 although these figures depend on the size of the bottle.
You can always cancel the contract when you have finished
I will be going this route once my old gas bottle is empty. The prices i've mentioned are only a rough guide they may be less or more but still cheaper than buying those disposable bottles.
Hope this helps.