Prior to priming, the surface should be smooth. It makes the painting process much cleaner and the outcome more professional (especially with glossy surfaces). The neutral gray of a primer highlights imperfections in a model and preps them to be sanded or filled with modeling putty. The goal of priming is to create a pristine print surface before painting. If the end goal is to create a show-stopping object, then primer is essential.
Depending on the 3D printing process you used, there might also be clearly visible layer lines. Without treatment, small step-marks or support marks will show through on the final surface, along with any large triangles visible in the 3D printed mesh. But anyone who builds 3D printed models for a living knows that paint hides no flaws.
This one step is priming.Īdding a final coat of paint to a part creates presence and polish. It makes painting effortless and helps create a flawless final surface. Most beginners skip it, but all experienced model builders do it. One step in the finishing process is the key to turning 3D printed objects into a professional product.
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