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Best filler for PLA?

Mike DMike DOGR Forum Member

Hi,

I bought a water tower printed in PLA a while back and need a little info before I get started. It is printed in PLA. I don't have much experience working with this type of plastic. So far I have found that it is tough, sands OK with some effort, and it's kind of hard to carve with an X-acto.

Based on your experiences with this plastic, what types of fillers work best for smoothing the surface out. I don't want to damage the surface with something that will craze or melt it, but I need good adhesion.

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SW Steve WOGR Forum Member DIGITAL SUBSCRIBER

I spoke with my son who has a couple 3D printers and used them a lot for robotics.  He hasn't had a need to do this, but he said a lot of people will use a 'filler and sandable' primer (often used for automotive painting).

Then you lightly sand it with a fine sandpaper.  Depending upon your application, it may take a couple rounds of sanding and coats.

I don't have experience doing this, but I have to wonder if you have a smaller item you are working on whether it would be easier to apply than a putty.  It seems like it might be easier to keep the original shape of the object.

To be clear, I'm not saying a putty would not work; I think it depends upon your situation.

If you use either the filler/primer or the putty, it would be great to know how it worked.  Maybe even before and after pictures.

Last edited by Steve W

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