What are the common problems encountered during the doming process and how can they be prevented or fixed?

Air bubbles and “fish eyes” are among the most frequent issues, often caused by improper mixing or contaminants like dust and oil on the substrate. To prevent bubbles, the resin should be degassed in a vacuum chamber before application, and any surface bubbles can often be removed with a quick pass of a flame or heat gun.
Fish eyes occur when the resin recedes from certain spots due to surface tension issues, which can be avoided by ensuring the printing material is entirely clean and dry. Environmental control is also vital, as high humidity can cause polyurethane resins to become cloudy or develop a foamy texture during curing. Consistent temperature and a dust-free environment are the most effective ways to ensure a flawless, crystal-clear finish.