Just in the process of doing my Cub and I,ve found the best method is to applying Koverall is this , I use elmers glue (wood glue )apply a thin coat over area to be done apply koverall and work it in to the material with your finger as I put it on stretch it round wing tips get a paint brush with some watered down glue and work that in ,it helps get the koverall over the leading and trailing edges ,then I leave it for 12 hrs or until throughly dry then put covering iron over it ,it shrinks up perfect every time and leaves a perfect job ,,, once thats done I then apply a very thin coat of watered down glue over it all that seals the koverall ready for the under coat then final top coats of the colour and hey presto you are done try this way you wont be dissappointed i bet