Is it advisable to skim coat MDF with drywall mud prior to priming and painting given the porosity of MDF? I recall seeing this tip somewhere but can't seem to locate it now. My thought was that skim coating the surface will fill the pores and reduce the ability for the grain to raise and become "hairy." Note: the paint will be a SW oil based enamel. Any advise would be appreciated.

Thanks in advance,
Brett