New surfaces or carried forward:
Sand surfaces to remove wood fibres: resin traces is removed using a nitro thinner. Fill any imperfections, sand and vacuum the dust.
Spray or brush a wood stain one coat, thinned with 10 – 20 % water.
After drying (3 – 4 hours), sand the surfaces and apply a one coat of finish glossy for indoor surfaces, two coat for outdoor.
Surfaces already painted:
Remove old layers of paint flaking, sand surfaces. Fill any imperfections and vacuum the dust.
Proceed as above