Can I basecoat with FolkArt® Outdoor™ paint?

Yes.

If you are basecoating concrete, for example for a bird bath or statue, a lime neutralizer is needed. Household vinegar works fine. Coat the concrete with vinegar, let it dry, wash it off, dry thoroughly, then it's ready to paint.

It is not ideal to basecoat a large concrete area to walk on (ie: a patio).