Restaining a wood garage door
I want to restain my faded wood garage door. The surface is smooth and doesn't appear to need sanding. After cleaning it with a solution of TSP and water and rinsing and drying the door,I notice that when I rub the surface, it leaves a mark as though there is a fine film on the door. I have also tried to clean with paint thinner, but I can still leave rubbing marks afterward.
Question 1. What causes this?
Question 2. Can I safely go ahead and restain the door or do I need a sealer? If so, what kind or brand of sealer would be best?
Re: Restaining a wood garage door
I would only re-stain the door if the color is uneven or some other visual problem. If that's all OK, I would seal it with a good exterior varnish. Two or three coats should do it for you.
If you don't keep the wood sealed, eventually, you'll be replacing the door or parts of it. Make sure you get a really good exterior varnish. Something that says it's a spar varnish should be fine. Minwax makes a pretty good one.