I've come up with what I think is a foolproof way to lay a perfect layer of micro over a roughed-out wing fillet. I should preface this by saying it's entirely possible that I stole this idea from someone's website or off the KR digest, but I really can't remember. If I did , I apologize in advance, but in any case, it's worth repeating.
Anyhow, after you foam and glass your wing fillets, you're going to want to lay a nice, straight, clean layer of micro over it to really pull the wing and fuselage together. The first step in this process is to completely finish both the wing stub and the fuselage up to the point were they make contact with the fillet. Next, take a roll of almost entirely spent duct or packing tape and size it so that one face of the roll makes contact with the fuselage and the other with the wing stub. Size it by tearing off the tape as necessary making sure that the roll makes continous contact with both the fuselage and the wing stub through the entire span of the wing while still leaving a very small visible gap between the fillet and the lip of the tape. Next whip up a batch of not so dry micro and lay a excessive amount on the fillet. Then, starting at either the leading or trailing edge, drag the roll of tape along the length of the wing. The micro will be compacted into the very small gap that you have previously set and produce a (nearly) perfect wing fillet. The excess micro is very easy to cleanly remove with a straightedge as the point of contact on both the fuselage and wing stub will be very clearly defined. Next, to sand the finished product, strip off a few feet or yards of tape (depending on what you used) so that the roll is slightly undersized as compared to the fillet. The reason you what to do this is because if you just wrap the existing roll with sandpaper and start wailing away on the fillet, you'll make an unwanted groove in the previously finished wing stub. To eliminate this possibility, undersize the roll, wrap it with 150 grit sandpaper, and gently start finishing out the fillet. This technique saved me a lot of time and anxiety and produced a really clean looking wing fillet. Mike Meyer
