I am interested in the 1500 clear as we would like to protect a deck and house siding but maintaining the current color. We live in California. Still ok to stain or too late in the season? We have power washed the deck and siding of the house. Any additional prep required? If too late in the season, any other recommendations to get through the winter?
The clear will not provide UV protection from graying. You will need to pick one of the semi-transparent color to achieve UV protection. The wood must be clean and free of any old coatings, oxidation/graying, dirt, etc. If your prep has achieved this then you should be good to apply the TWP stain. As for weather, temperature for application should be 50+ degrees and wood needs to be dry.