Step 1. Wash the stained wood with a warm soapy mixture of Dirtex and wipe dry. Reset nails and fill nails holes with spackling and let dry.
Step 2. Dull the stained wood with #180 grit aluminum oxide sandpaper. Sand the spackle smooth. Vacuum away dust.
Step 3. Prime with Zinsser Bulls Eye 1 2 3 white primer or Benjamin Moore Fresh Start acrylic primer.
Step 4. Caulk any gaps between wood trim and wall. Caulk gaps in door and window trim. Wipe smooth with finger and damp cloth. Let dry at least 2 hours.Use an acrylic paintable caulk found in paint stores. Buy the good stuff.
Step 5. Apply 2 finish coats of 100% acrylic paint in your choice of brands as long as it's a quality brand.

Michael