Staining Multi Level carve..... Spray Stain?

Howdy…I have a couple nice multi level carves… Last name in the background with the first names of the couples layered on top. The sign isn’t that large… and the fonts are real small… I have no idea how to stain them. Would I use a artist paintbrush… or do they makes cans of spray stain. I curious as to what eveyone does in this case. By the way… I am a newbie… and I plead ignorance.
Thanks… Chuck Lyons