Also some additional information on the Min Wax product. It's important to understand we are dealing with basically liquid plastic. One of the great things about it is its ability to even out the density of balsa. We all have had those sanding jobs from hell that we never seem to get right. It usually shows up where we glue on the leading edge or end caps and we get a little ridge due to glue or in many cases to differences in density from the adjoining woods and of course the more we sand, the worse they get. When we apply the Min Wax it helps level out the density difference between those adjoining woods as they all just become "plastic".

In fact that's pretty much what is happening. The wood fibers and in-between pours become saturated with plastic. So now when we sand those problem spots, they just vanish due to them being the same density. If I get one of those problem spots, I just leave it alone and level it out when I sand the silkspan back after the Min Wax has dried.