Advice on refurbishing 3d prints?

[LtPinkerton]

Recently got some parts in from a commission that are less than awesome. However, they where cheap so I can’t really complain.

The parts have layer lines and are the wrong color completely. I need to get rid of those lines and repaint.


What would be the best method? Planning on sanding the paint, hitting with Bondo, and going from there. Would that work?

 

[zorg]

this is a handy thread,

Don't waste time sanding 3d prints, shave them!

Carpentry and Luthier card scrapers are the bomb when dealing with PLA prints!

www.therpf.com

scraping can remove 80% in a very short time.

after you can get most of that done,

i would not go too course with the grit paper as that tends to leave a "furry surface"

after scraping and sanding, i personally use 3m spot putty in thin layers, its soft and easy to sand. others use 2 part wood filler, i've not used it myself so can't comment.

 

[Starbase101]

I've used Bondo glazing putty with excellent results (PLA prints):

 

[JPH]

Xtc is a resin that helps get rid of print lines. Mix the color you want and apply thin layers. Don't GOOP it on, better to apply five thin layers than on or two thick layers

 

[Lykle]

I was going to mention XTC as well, even though I have only seen it used on YT. Need to get some and start testing with it.
Have a lot of props I will need to make next year.
Sanding PLA is tricky, as you have to go slow. Go to fast and it gets soft and will get furry (as mentioned by Zorg)

One of the things I have good results with is a filler primer spraycan. 4 layers and a little sanding will smooth out the lines perfectly, depending on the quality of the print.