I sanded and painted a wooden dresser. The rep at Lowe's said I don't need a separate sealer, but that sounds fishy to me. Should I put sealer on it too?
A sealer shouldn't be necessary unless you like the look better.
If you do decide to try a sealer, you need to select one that is compatible with the paint that you used.
It's always a good idea to try out your planned finishing steps on scrap. You can try several variations and decide what looks best.