Regaining Sanded PETG Colour: Heat Didn't Quite Work for Dark Parts...

Submitted ⁨⁨5⁩ ⁨days⁩ ago⁩ by ⁨Mr_Mofu@lemmy.blahaj.zone⁩ to ⁨3dprinting@lemmy.world⁩

Continuation from this Post: lemmy.blahaj.zone/post/36954883

After many of you Suggested that Heat could be a Potential Solution to Regaining Sanded PETG Colour, I got myself a Heatgun Capable of 600c°.

While it did Improve the Colouring, Especially for Darker parts it wasn’t Enough. To be a bit more Specific, Both Green and Yellow Parts Fully did regain the Colour Red Improved a Lot, but not quite Satisfactory And Black did make a Difference, but its not Nearly Close enough, being a Matte Dark Gray instead of… Black

I’ve noticed that the Black only did regain its true Colour once actively Melting and Warping which doesn’t help… Otherwise its a Light/Dark Gray Matte Black.

So I think the Heatgun Method doesn’t quite hold for Dark Parts. What other Methods of Regaining Colour are there?

I do still have MEK that I could Try. I also Heard that Clearcoat could Work and that there are 3D Printing Specific Brands, should I give that a Shot?

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daannii@lemmy.world ⁨4⁩ ⁨days⁩ ago
Did you try the plastic restorer I suggested? You can get it hella cheap on alexpress.

“Headlight restoration” is usually what it’s called.

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- definitemaybe@lemmy.ca ⁨4⁩ ⁨days⁩ ago
  Not OP, but that search brings up a bunch of different products on AliExpress: black paste, white paste, sprays, creams, liquids… Do you know if it matters?
  
  Thanks for the tip, regardless. They’re only a few bucks each, so 8 could try a few, but if you have one you know works for PLA and/or PETG, I’d appreciate knowing what worked for you!
  
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  - daannii@lemmy.world ⁨4⁩ ⁨days⁩ ago
    I saw your edit but yeah. It’s a clear liquid. Watery.
    
    It actually has a really pleasant soap-like smell.
    
    I apply with a folded paper towel. You could use a sponge to make sure it’s 100 % lint free. But paper towel seemed fine for me.
    
    I basically applied it like if you were using nail polish remover.
    
    There are probably different approaches. I don’t think it’s going to matter too much. Just note its intended to be a wipe-on. Not a soak. Not a slather-on.
    
    So it is going to go far and last you for many projects.
    
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morbidcactus@lemmy.ca ⁨4⁩ ⁨days⁩ ago
Just make sure you’ve got good gloves/respiration and ventilation if you go MEK, as far as I recall it’s not nearly as aggressive with petg like acetone and abs so going to take some time. The solvent method is by far the one I use the most often, I wet a rag or paper towel and take my time. I recall vapour smoothing being a thing too but that’s going to need setup and the like.

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