Adhering paper to a panel is a technique used in fine arts to permanently mount watercolor paper or other types of paper to a rigid support, such as a panel, prior to or after painting. Golden Artist Colors recommends using their Soft Gel medium to achieve a strong bond between the paper and the panel (Source ID: none explicitly provided, but mentioned in multiple snippets). The process involves applying a thin coat of Soft Gel to the back of the paper and the panel, then attaching the paper to the panel and allowing it to dry (Source ID: videos-43). This technique helps prevent edges from curling and air pockets from forming, and it reduces the amount of gel needed for the bonding process. It is also important to test the adhesion of different materials and substrates before starting a project to ensure a strong and lasting bond (Source ID: multiple snippets).