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Very informative including some history. I took my Hungarian PA-63 apart, removed the chipped paint from the aluminum frame, cleaned and reassembled while pausing the video between steps.I didn't see that he showed the very very small spring behind the magazine lock. I spent some time looking for that one. There are too many "secrets" to taking these guns apart to attempt without this information.
I thought it was a very good video with extensive detail in all phases of the proceed. I feel with my abilities, it would be no problem to produce a good finish the very first time.
The only thing I feel it did not answer is how many guns the mix would do before being depleted and how long the chemical would keep (mixed) to be used again.
The bad part is when I looked at prices for the material and equipment, this is not something you can afford to have setting around to do 3 or 4 guns a year