A customer wants their deck refinished. The deck boards have what appears to be a semi-solid deck stain. The posts and spindles have what appears to be a glossy polyurethane with stain. The product polyshades comes to mind, stain and polyurethane mixed together. The posts and spindles are not in that bad of shape, but there is some black from what I can only guess is some kind of mold? I am worried that if I were to try and apply some new finish to the posts and spindles that because of the glossy surfaces that the finish will not adhere that well. With so many spindles sanding them would drastically raise the price of the job.
I think the deck and railing would look best all one color. There are primers that supposedly adhere to glossy surfaces, is this a perfect place to use one? Do they work? Or must one bite the bullet and sand the posts and spindles?
Thank you for any suggestions or help.