One of my least favorite tasks associated with building vehicles is sanding and bodywork. To me its a dusty mess that magnifies any slight mistake or shortcoming in technique. Getting these plastic parts from a rough RP surface to something with a decent finish requires naught but time, sandpaper and elbow grease.
I left the parts after a first round of sanding and filling primer. They looked decent from 5 feet away but on closer inspection still had decent evidence of the stair-stepping artifacts of the layer-based FDM process.
Any surface imperfection will be faithfully reproduced in the mold, then the wax, and finally in the cast steel part so the idea is to make the surfaces as smooth as possible.
Back to the sanding room with a bit of glazing putty and some sandpaper results in what looks like even more of a mess:
Once that dries its time for a pair of gloves and a bunch of sanding boards/paper/sponges.
A few hours later and the parts are starting to look pretty good.
Now its time for another coat of filling primer in Peter's paint booth and an overnight dry.
1969 Ford pickup Cummings turbodiesel conversion. Hint: making sure other parts are properly covered before spraying primer goes a long way to happy shopmates. Putting things away helps too but that's been a problem of mine for a long time.
The parts are really starting to look nice.
That's all for now.