I’ve found the 1 micron film edge, lacking. No experience with 1u paste.
I refresh my edges with diamond pasted balsa 0.5, 0.25, 0.1.
Which is also my finishing progression after stone/ film
Mostly just 0.1, if I don’t feel edge is responding, I do whole progression.... spine leading laps. And it doesn’t a hi volume of laps.
I’ve read where some have maintained there edges idndefintely this way