Filing, Putty, And Sanding…
Make it smooth…
The bottom of the tank printed really rough. It’s going to take quite a bit of work to get it all smoothed out…
First step was filing it with a metal file. This helps knock off most oft he high points, and also rounds it out.
Next, it got fully coated in glazing putty.
Wet sanding with 220 grit sandpaper.