I have a very large pine tree in my back yard, and I believe that the oil somehow discolors the cream paint on my painted wooden siding. The discoloration is a grey blue color.
If I'm correct, then I would welcome a solution.
Thanks. I am located near Toronto in Canada. The tree is about twice the height of the house, and its lower limbs extend very close to the house. The tree is more or less south of the house. The side of the house in question sees the sun in the morning. Last year I tried to climb the lower portion of the tree, and failed for it was covered in sticky sap.Follows is a picture of the contamination.