Started working on the right side fuel tank again.  I had previously cleaned up the pro seal left from riveting the tank stiffeners that I did several years ago.  Today I applied proseal to the rivets and mating lines.  I mainly did this just to have a low impact task to get back in the swing of using proseal again.  It really is some nasty stuff.

I initially just penutbutter spread the proseal across the rivet line but that was using a lot of proseal.  So I switched to doing generous blobs on top of each individual rivet.  I think either will seal just fine.