I have already trimmed the cowl to be ready for gluing together. As soon as I glue it, I will need to know what type of filler to use in the gaps, so I can later sand it all to a nice seamless part. I read that bondo might crack under certain conditions. What is the best idea? What about a trick I read about that mentions epoxy mixed with sodium bicarbonate (baking soda) to use as filler. What is my best shot at this?

Then, when I have to sand the whole part, what grit should I use to get it all nice and even to prepare for primer?


Edit:
I found this method listed here in RCU, I think I'm gonna give it a shot.
http://www.rcuniverse.com/forum/m_16...tm.htm#1686789