Now that I have the body straight I want to flatten the bottom, get it nice and level. In the end I will probably cut out a piece of styrene plastic to finish the bottom.
First it gets a light raking to take down any light bumps or ridges. Then putting the piece on the flat tabletop I press it down and twist it.
Now there are shiny spots where the contact was made, these are the areas where we need to rake it down a little more.
That will take care of the bumps, now to go after the depressions. Take a straight edge lay it across the surface gentle drag it across.
Create a grid pattern. Now it will be easy to detect low points where the ruler didn’t touch that need to be filled in. Just repeat the process until you feel it as flat as you want it.