Got much better results after making the following adjustments.
- Bed leveled (still having trouble getting the first pass of the test print to stick but I'll leave that for another time)
- 1.2mm Outer Wall
- Moved my machine to a more sturdy surface (it was on a cart that sat slightly unevenly on casters and would rock during printing despite my best efforts.)
One if not all of these things definitely cleared up the 'stippling' problem I was having. As for the superfluous extrusions on the scaffolding and print edges I discovered those were the result of an 'on print' support whose first layer failed to adhere so each subsequent layer's extrusion was left hanging from the nozzle until it moved to its next location, often the next support structure, where it would be deposited.
Thanks for all the great tips, very much appreciated.