Wooden Bird House

What can I use on a wooden bird house to keep it from weathering?
It is made out of wood and painted but I want it to last awhile and dont want the rain to rot it. What can i use and how much does it cost?
Spray it with a clear acrylic spray paint. Use several light coats. Make sure it is clean and dry before painting. They also sell a UV poly in a spray can which should protect it against the elements. These tend to yellow in the sunlight so if there is any white in the color use the acrylic.
How To Make A Wooden Bird House Pt. 2
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