i am having a problem on an east wall on my house that i paintesd just last spring. i washed, let dry, then sc****d and sanded. i used a wagner paint eater which pretty much feathered the paint that would not come off. used an oil base primer and two coats of latex exterior paint. the paint that is cracking and peeling is coming off showing bare wood, primer with the paint. this wall, so far, is the only one that is doing this. i do seem to recall when i painted it was pretty sunny but not really that hot. anybody have any suggestion as to what i may have done wrong?? oh, the wall is cypress weatherboards.