less time is always better 
I got the tumbler. I’m throwing in solid brass screw with a wood print. I had a feeling it will come out shiny… Will tumble overnight
I’ll check in the morning. Still tumbling
Might be interesting to try with abs, and after it gets a metal patina, you could Acetone Vaporize it.
@Jim_Inziello
nope. Layer lines in all of them and no details left.