So I've got this beauty for my 3 little ladies to dust bathe in... Question is, should I seal/paint it? If so, what with? Options I have on hand: Helmsman Indoor/Outdoor Clear Satin Spar Urethane, Valspar Interior/Exterior Spray Paint&Primer and some leftover cans of interior paint. Of course this is all assuming they'll use this new designated area... TIA!