Car Exhaust Stub

So attempted another print, but the scaffold lifted off. So I modelled my own brim and printed it again.

Here are the results:

The underside showing my own brim:

Close up of where it lifted up, I think due to some contraction of the scaffold:

Scaffold closeup from the side:

Close up of the top

Really happy with the print quality of the sides, after some calibration setup on the extrude rate from the slic3r wiki

A view from the top after some sanding, it needs quite a bit more. Also I want to see how this 'silver' filament comes up with some very fine 1200 or 2000 grit sand paper

Finally testing on the car:

Here they are, all done and complete:

Very nice Caswal.  Any chance you can detail your finishing procedure and show some closeups of the parts finished.

I have another part I am going to do, and detail the whole process. If you look at my door mirrors, they are missing their clips to hide the bolts that hold them to the door. I have one but not the other. So I will print 2 to replace both of them.

My process is:

• Print object at 0.3mm

• Remove Support using one of those art scalpels

• Sand back with 240 grit sandpaper, smooth the worst of the layering out

• Use a dremel with sandpaper roll for some of the more hard support material clinging on

• Coat with 3-4 coats of Automotive Spray Putty (Leave only 5-10 minutes between coats, than an hour or 2 to dry)

• Sand back using 240 or 320 grit to get all of the layers out

• 1 - 2 Coats of Filler Primer (Only 5-10 minutes between coats)

• Another quick sand of 320 or 360 grit

• 2 coats of base matt black

• Spray of Graphite colour

• While wet, a light flourish of silver

• Final spray of matt black on the rear of the vent to give it a soot look

Although the process sounds laborious, it is not really that bad. Probably per vent is about 20-30minutes of sanding, and the rest is just a lot of waiting while the different coats dry. I'm still amazed at the ability to produce items like this at home now.

Pretty standard Slic3r settings, distance dropped to 2.25mm rather than 2.5mm, and modelled my own Brim. that seems to help immensely. As it lays down the brim with normal solid infill settings. Then sticks the support onto the top of that. I have not had much luck with the auto generated brim.

Using acetone and a paintbrush on the exterior would smooth that all out if you dont have the vapor setup yet.