Hello GD, I think you are going to have a hard time replicating the foot pedal pump with a hand amptrol.
Even Brad has distinct preferences as to what brand and type of foot pedal he likes for pedal pumping.
That said, it never hurts to try. You might need to set amperage a lot higher than you normally would with the hand amptrol so that the stroke is short on the slide.
As far as identifying metals, There are so many grades that there is no simple method that works every time.
But a magnet and a file is a good start....along with a spark test with a grinder if that is possible
The magnet serves more to rule things out than accurately identify.
and the file gives a bit more info on hardness after the magnet rules certain metals out.
For example, if it is strongly magnetic, that rules out aluminum, magnesium, titanium etc.
Usually that means steel but not always because there are several grades of stainless that can be pretty strongly magnetic like 301. and even some other stainless steels that are severely cold worked can be magnetic,.
thats where a spark test with a grinder comes in... that just takes experience and some trial and error.
here is an interesting link that deals with identifying metals https://www.weldinghandbook.com/types-of-metals/metal-identification/
hope this helps a bit,