Tom,
This is a particularly good seam to slightly brake downward 2 or 3 degrees the nose skin edge that lies on top of the skin/spar. Van's discusses this somewhere in the general instructions. The nose skin is rolled and residual curl will lift its edge aft of the rivets to leave a gap. I don't consider this the same as beveling an edge as in deburring.
You have to reach. Shift through your bucking bars to find one that can bear against the spar for reference and have its bucking surface normal to the rivet. Tape on spacers here and there to set it up for the purpose. Put duct tape over that part of the bar that might abraid the reference bearing surface(s). You'll get good at detecting bar position with your fingers by feeling for adjacent clecos and bucked rivets.
John Siebold