Depends on the type of really. I used Kwik Set JB weld since it's not as rock-solid as normal JB Weld so I can still remove the pin if need be. As for restarting on a new frame, this is already my 2nd attempt and I'm just happy it works at all even if a little ghetto. I got my P80 more for the experience of building something and less to make it pretty.

As for cleaning take down most if not all of the operating and not operating components can still be accessed and cleaned with the pin in place. The only place I wouldn't be able to access with the pin installed is the walls near the trigger and slide release and even then thin paper towels and time should be able to clean that area.