Derek Cohen (Perth Oz)
Established Member
As others have noted, you always plane up hill. I suspect that what you are asking is what to do when tthe grain is not obvious. Rough sawn boards can be vey woolly and grain is further obscured by dust. Often I will need to take a light shaving with a jack plane to uncover the grain. Sprinking a little water on a side helps. Beer is not a substitute - just a waste - unless you're drinking while making up your mind.
Regards from Perth
Derek
Regards from Perth
Derek