Smoothing Saturation Lines in PLA 3d Prints (evakura tutorial)

PerniciousDuke

RXO & BCO
405th Regiment Officer
Community Staff
This process was not developed by me. It was developed and shown to me by EVAkura who authorized me to write up a tutorial. It has since been used by many who immediately contact him thanking him for the hours of sanding he has saved and how cheap and accessible the products are.



Materials:
3d Printed Part
Krylon Triple Thick Glaze
Krylon Chalky Finish Spray Paint

Krylon.jpeg Chalky.jpg


*Disclaimer: For these photos I did 0% sanding just to show you what the results can be with the least amount of effort. Trust me, you will get better results if you sand your part in between any or all coats of Glaze/Paint.


This process is similar to using thick filler spray paint, but is more controlled which results in better kept edge detail. There is some sort of reaction that happens when spraying these two Krylon products together while they are still wet that helps it autolevel when drying.



20190223_160627.jpg Here is an uncoated, PLA 3d print. Take a hobby knife or craft knife to it to knock off any supports or overprints that should not be part of your final piece.


Step 1: Spray it with the Triple Thick Glaze enough to coat, but not enough to pool. Keep the can 12” away from part and try aiming for the hard to reach parts first.

Step 2: Immediately (before the glaze dries) spray the part with the Chalk Paint in a light dusting. Keep the can 18”-24” away from part and do not hold down nozzle for long periods.

Step 3: Let dry completely and sand with 220 grit if desired.


Repeat all above steps 3-4 times
. On the last coat sand with 320 grit if desired.

I used a heat gun at medium setting from a couple feet away, just to help the drying process along.

20190223_161353.jpg 1st coat of Glaze+Chalk (let dry 5-7 minutes)
20190223_162746.jpg 2nd coat of Glaze+Chalk (let dry 7-10 minutes)
20190223_164203.jpg 3rd coat of Glaze+Chalk (let dry 10-12 minutes)
20190223_170047.jpg 4th coat of Glaze+Chalk (let dry 15 minutes)


Step 4: Select your final paint and test a small section to see if there are any reactions to the glaze/chalk layers. I have seen standard Acrylic Spray Paint as well as Automotive Enamel Spray Paint work with no issues.

20190224_095637.jpg I sprayed my test on the lower left corner and then sanded it off once dried.

Step 5: Spray paint your piece with 1-2 coats of paint following the directions of your paint.

20190224_173207.jpg Again, this is with no sanding between layers. Sand between layers for even better results.


And you're done!



20190223_160612.jpg Here is another photo just to show you that a splotchy pattern between layers is normal.
 

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TurboCharizard

RMO & BCO
405th Regiment Officer
Community Staff
I'm trying out this method on a project that I'm working on with a friend and the results are fantastic.
DSC_0568.JPG
For larger pieces we sanded through my normal procedure but for thin and brittle parts we went straight to this method and it's staggering. Thank you for writing this out.
DSC_0569.JPG
For the Canadian readers, the Krylon Crystal Triple Thick Clear Glaze and Krylon Chalky Finish Misty Grey are confirmed the same this side of the border as what PerniciousDuke describes. Both can be found at Michael's.
 

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