I know this question must have been asked before but I couldn't find it in my search.
I built an oak headboard for my son about 3 yrs ago using Minwax Polyshades, an oil based stain and polyurethane product. Now my son wants the headboard stained darker. The headboard has a mission style design and has many 3/4" square spindles with 3/4" space in between spindles. So re-staining it by hand will be very difficult. I plan to spray with a water based stain because it will be easier and the stain will dry faster.
My question is: is it advisable to spray a water based stain over an oil based stain? What kind of prep work I need to prepare the headboard to accept the water based stain? What brand or type of water based stain is recommended for spraying. Any help will be appreciated.