Ideally no paint as buying an entire bucket if white paint for a white print seems wasteful.
Is there any sort of filler I could use to hide the seams between the parts I have glued together?
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Buy a 3d printer pen. Believe it or not they are pretty great at filling the spaces as long as the spaces are not too complicated or wide.
I came here to say this. Mine was, I think, name brand and it was only $35 and I’ve already used it to fix a few broken and flawed prints. Heat the filament up a little extra and you can squish it in place with the proper implememt without much if any trouble.
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I used a mixture of baking soda+super glue which you can apply using a small spatula. This would require sanding afterwards of course and ideally painting, but it worked for me.
Print using a scarf joint so the seams have an overlap. Also that would get them up off the build plate where your warping problem is.
White silicone caulk would probably work well. Silicone wont get flaky or degrade over time.
If it’s a straight edge and the measurements don’t have to be too precise I would just sand the edge flat, personally
What material is this?
PLA
I was going to suggest solvent welding, unfortunately PLA’s solvent is extremely toxic. Were this ABS or ASA you could mix acetone and some raw fillament to get this gloop-like mixture. Fill the gap, let it dry and you have a solid bond as strong as if it was printed in one piece. Can also be used as a glue and is just as strong.
Maybe some modeling putty like Green Stuff?
Can you remove material from the left side of the joint? That would close the gap on the right.
Sugru would be pretty good at filling the gap
fiberglass?
Print a 1 or 2 layer thick rectangle the length of the seam. Maybe 1cm wide. and glue on top. Sort of like how you use tape.
