i have had this problem before, but though i had it licked. after my brown trout dried for about 2 weeks, i sealed it as usual with bowmans sealer. sometimes, like on this one, when i apply the silk span and it dries, it gains this curl to it. why does it do it so some and not others. this method has been working mostly good for me, but every now and then i get one that curls. what am i doing wrong.