I have applied Tru-oil all seasons,at a wide range of temps.Hang the bow with a string,balanced at center.I prefer to apply it with my finger.I place small droplets the lenght of one side of a limb,then spread it out quickly and evenly,careful to run my finger down the corners to leave no excess,then the other side,the belly and lastly,the back. then,flip around ,and repeat on the other limb. Quickly,check each limb after coating,to remove runs.If a run slips by you ,it can easily be removed after the coat has dried,with fine paper and steel wool. I prefer to finish in a cool temp,for you have more time to work it flat and smooth. Remember,more light coats turn out much finer than a few heavy coats. I generally put around 10 coats on osage,but on hickory maybe 15 coats to fill the grain to my standards. After the last coat dries,I LIGHTLY remove the gloss with very fine steel wool.then buff with a cloth to bring out a fine satin finish. JMHO God Bless