MDF is alright for molding if it's used somewhere that doesn't get wet. It's literally a sheet of paper. If you can find some clear pine that would work well. Knots present a problem with the sap bleeding through the paint. If you could find some poplar that would work very well. It's mostly clear and doesn't have the sap problem pine does.Will be installing decorative wall molding using 1x4 and 1x3 lumber. Best choice of wood? Or should I use MDF? It will be painted white.
One option to avoid exposed end grain/cuts is to put mitered returns on the ends. Probably more important if the trim were to be stained instead of painted but might look better if the trim edges have any type of profile.Thanks for all the help, guess I am going with poplar. Since there will be exposed end cuts should they be sealed prior to painting? Have seen posts about using joint compound or spackle for this purpose. Any thoughts?