I used the Dura bloc long boards in two different lengths. The key is to approach the area from all different angles. Mostly at a diagonal and changing directions every so often. Use a guide coat and finish with some glaze type material (basically thinned out bondo) and you will be pleased. It takes lots of time, muscle, and patience to get it right.
This was my first attempt at bodywork and I am happy with the areas I gave sufficient attention to. Get lots of compliments, too.
