I intend to stain a piece of smooth timber to use indoors as a mounting board for some coat hooks; something I've never done before. The instructions for the stain I purchased suggest not to use below 10°C, and it's currently 7°C here during the day. I have a garage I can use to sand the wood, apply and dry the stain out of the rain, but it is unheated.
Will I run into problems if I use the stain in sub-optimal temperatures? Advice websites advise against it, but don't go into the specifics. An answer to another question suggests leaving an exterior fence stain until warmer weather in spring:
Didn't stain my new fence this summer: do it while its cold or wait until next year?
Definitely wait. The temperature will be dropping low enough during the stain's curing process that many problems could present themselves.
but I'd like to do this while I have the time and inclination! This answer doesn't elaborate on what these many problems are (stain taking 10% longer to dry? stain not staining at all? wood spontaneously combusting?!) and how problematic they would be.