Thank you for the comments.
Regarding previous test with MFMP I have explained the situation quite precisely on the forum. But it is uneasy for everybody to find it.
I have agreed to make the test as occured situation allowed just two options:
Something for thinking...
t1 - traces on the adhesive carbon tape
t2 - trace that extends out of the adhesive tape to the aluminium sample holder
t3 - trace on the aluminium
t4 - closeup of the trace with a particle formation
t5 - metal particle shot…