10+ Primed Wood Trim. I then prime the surface two times with a waterborne bonding primer called stix. Sand the surface with medium sandpaper (100 grit) to rough up the surface.
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This should help break up the varnish and prime all the surfaces using the bonding primer and a paint brush. Installing wood trim not only makes a house look complete and stylish; Back priming the wood will make it last longer but you can still get failures down the road if that primer coat fails and there is a source of moisture from inside.
Painting wood trim (painting trim of any material) does take longer than painting walls:
Wood trim around exterior windows and doors can begin to wear, warp and rot over time. Also note that trim and painting of primed trim are great diy projects. You should also prime before painting over any discolored or an extremely dark colored ceiling especially if you plan on painting a. How to prep before painting wood trim.