Paint comes in various sheen. There is Flat, Matte, Eggshell, Satin, Semigloss and Gloss, with Flat being least shiny and Gloss being most shiny and reflective when dry.
Flat paint is most porous and Gloss paint is most moisture-repelling. Flat is fastest drying and Gloss is slowest drying due to added glossy agents. Flat paint hides imperfections on your wall, while Gloss paint reveals them.
We suggest you use a flat, matte or eggshell finish for your background wall paint. The more glossy your background paint color is, the less it absorbs your stencil paint and the more bleed and smudging can occur.
Flat stencil paint on a flat background is ideal combo. The background will absorb the stencil paint which will dry very quickly, almost instantly, between repeats.
If you are looking to use different sheens, try stenciling with a gloss or semi gloss over a flat background color, but remember that gloss paint is slower drying, so allow more time between repeats to avoid smudging.