on a glass plate the film was baked at 230 u00b0 f for 0 5 hour and it formed a hard glossy coating formulation c having a gardner holdt viscosity of r was cast as a 4 mil thick film on a glass plate under ambient conditions the film dried to a slightly cloudy tacky coating in about 24 hours the procedure of example 4 was repeated except that the cast film was baked at 230 u00b0 f for 0 5 hour and formed a hard glossy clear coating each of four beveled siding panels of red cedar wood was painted with a brush on coat of one of the formulations d e f and h and allowed to dry for 8 9 days the process was repeated until each panel had three coats of the same formulation the panels were then subjected to accelerated weathering tests in an atlas twin carbon arc model dmc weather o meter as indicated by the ratings in table ii formulations d and f containing the tfe resin performed better than the urethane control table ii__________________________________________________________________________accelerated exposure test ratings sup a coating time general waterexampleformulation composition sup b hr appearance checking cracking flaking erosion color sup c gloss spotting__________________________________________________________________________6a d pfe 600 10 10 10 10 10 6 dk 10 67a e sfo 600 10 10 10 10 10 8 bl 10 108a f tfe sfo 600 10 10 10 10 10 6 dk 10 109a h control 600 5 10 10 10 5 5 dk 4 6b d tfe 1000 6 10 10 10 7 4 dk 6 57b e sfo 1000 7 10 8 10 7 6 bl 8 78b f tfe sfo 1000 6 10 6 10 6 5 dk 6 79b h control.