Start with safe support cleanup, use progressive grits, keep heat and dust controlled, preserve edges, and apply filler or primer only after the surface is clea.
Start hereStart with safe support cleanup, use progressive grits, keep heat and dust controlled, preserve edges, and apply filler or primer only after the surface is clean and dry.
First safe actionRun the first safe check and change one variable at a time.
Proof targetA small representative test no longer shows the original symptom.
Match the failed area to the visual before changing a setting.
Repair progress0 of 8 complete
Step 1 of 8
Remove supports and obvious nubs with appropriate cutting tools.
Keep the problem and target visual open while you make this change.
Why this matters
Deep scratches remain beneath finer sanding.
Setting or checkLayer height
Smaller layers reduce finishing work but increase print time.
Expected result
The original symptom no longer appears during a representative calibration or short test print.
Step 2 of 8
Wear suitable respiratory and eye protection and control dust.
Keep the problem and target visual open while you make this change.
Why this matters
Thermoplastic softens and smears.
Setting or checkWall count
Provide enough material before aggressive sanding.
Expected result
Measurements, temperatures, motion, feed, or exposure remain stable through the complete test.
Step 3 of 8
Start with the least aggressive grit that removes the defect.
Keep the problem and target visual open while you make this change.
Why this matters
Edges lose definition.
Setting or checkSeam placement
Hide the seam on a less visible or easier-to-finish face.
Expected result
No new warning, collision, leak, electrical smell, unusual heat, or material damage appears.
Step 4 of 8
Sand in controlled directions and protect crisp edges.
Keep the problem and target visual open while you make this change.
Why this matters
Dust and oils interfere with filler and primer.
Setting or checkLayer height
Smaller layers reduce finishing work but increase print time.
Expected result
The successful change is recorded with printer, material, slicer, nozzle or resin, and date.
Step 5 of 8
Progress through finer grits after the previous scratches are uniform.
Keep the problem and target visual open while you make this change.
Why this matters
Solvent or coating is incompatible with the material.
Setting or checkWall count
Provide enough material before aggressive sanding.
Expected result
The original symptom no longer appears during a representative calibration or short test print.
Step 6 of 8
Use wet sanding only when the material and cleanup method permit it.
Keep the problem and target visual open while you make this change.
Why this matters
Deep scratches remain beneath finer sanding.
Setting or checkSeam placement
Hide the seam on a less visible or easier-to-finish face.
Expected result
Measurements, temperatures, motion, feed, or exposure remain stable through the complete test.
Step 7 of 8
Clean and dry the part completely before filler or primer.
Keep the problem and target visual open while you make this change.
Why this matters
Thermoplastic softens and smears.
Setting or checkLayer height
Smaller layers reduce finishing work but increase print time.
Expected result
No new warning, collision, leak, electrical smell, unusual heat, or material damage appears.
Step 8 of 8
Test coatings on scrap before finishing the final model.
Keep the problem and target visual open while you make this change.
Why this matters
Edges lose definition.
Setting or checkWall count
Provide enough material before aggressive sanding.
Expected result
The successful change is recorded with printer, material, slicer, nozzle or resin, and date.
Controlled test log
Change one variable, then record what happened
This keeps temperature, retraction, speed, mechanical, and material tests from blending together. The history stays private in this browser.
Post-ProcessingHow to Remove Supports Without Damaging the Print
Post-ProcessingPriming and Painting 3D Prints
Post-ProcessingGluing Multi-Part 3D Prints
