I am not familiar with 1050 sheet, but I do 3d work in 6061 regularly. This is what I have found works.
Feed to match
SHARP! Cutters. For a finish quality job I'll often start with a brand new cutter each time.
Flood coolant. (for small jobs I can get away with either hand spotting with Wd-40 or sometimes just a continuous air blast) I prefer flood coolant.
The largest cutter that will fit in the job