We always recommend matching the finish to the surface that the decals are being applied to. For example, choose a matte finish for a matte fork, and gloss finish for a glossy rear shock or frame.
Real stealth decals are a combination of matte & gloss. Select matte base for a matte surface, and vice versa.
For Premium Foil chrome prints we always keep the chrome parts glossy. If you select a matte finish for a chrome kit – the decal background will be matte only, and the chrome parts stays glossy.