Paint compatibility is a product question this tool cannot answer
Thousands of specific paint and primer products exist, each with its own chemistry and compatibility with different plastics, and no general tool can tell you whether your exact can of spray paint will bond safely to your exact filament without lifting, crazing, or peeling. What this tool can do is make sure the parts of preparation that apply regardless of product, sanding, testing, curing, masking, and environmental exposure, are not skipped.
How the checklist works
A checklist builds from your inputs: whether the surface is already sanded, whether any functional surface needs masking before the first coat, and whether the part is headed indoors or outdoors, which changes how much UV stability actually matters for the coating you choose. A scrap-material adhesion test and full cure time before handling are always included regardless of your other answers, since skipping either is one of the most common ways a coating job fails after the fact.
Worked example
Surface not yet sanded, outdoor use, masking needed for a mating surface: the checklist recommends at least a light scuff-sand before priming, confirming UV stability of the chosen product since it will live outdoors, and masking the mating surface before the first coat rather than after, since paint is far easier to keep off a surface than to remove from one.
A common mistake
A frequent error is handling or stacking a freshly coated part before it has actually finished curing, not just drying to the touch. Many coatings feel dry within minutes but stay soft underneath for hours or days, and handling them too soon leaves fingerprints, dents, or smudges baked permanently into the finish. Always check the product's actual cure time, not just surface dryness.
Limitations
This returns a general preparation, adhesion-test, cure, masking, and exposure checklist, not a claim that any specific paint or coating product is compatible with your material. Always test on scrap material first.