I just started covering the new plane and started with the easy part, the wing. People have asked about covering hinge gaps and there are a lot of ways to do it. In my case i like to cover the wing and ailerons with one piece of covering and close up the hinge gaps all at the same time. It's really easy and clean up at the end of the day is a snap. First I only use Ultracote for my main covering. If I can find it I like to use mono or cheap econocote for my trim colors, using windex/ammonia to lay down the trim is a lot easier and it doesn't work with Ultra. I couldn't find any yesterday so I am stuck with the Ultra black for my trim. Not a big deal but for someone just learning to cover using mono trim is a lot easier.
First thing you need to do is put on some of your main color for what I call fillets. This way there will never be an open wood spot for oil to get into and soak the wood. I have the fillets on both the TE sides and the aileron sides then I glued in the hinges and got the ailerons on the wing. Covering the wing is easy, just don't cover the ailerons yet. When the wing and TE are covered I cut the covering at the sides of the ailerons then iron the covering onto the wing TE then the tapered side of the aileron LE while holding the aileron down to it's total deflection. After that I just draw the iron down from the aileron LE towards the TE. From then on it's just trim the covering and finish ironing the over lap covering down. With the wing flipped over you can see the covering along the hinge gap. Bottom of the wing is complete and you just do the other side.
I work my wrinkles towards the center of the wing, Ultra shrinks so well I just do it with my iron. Wrinkles just sort of flow right off the wing like magic.
Slots and/or holes I open with a small soldering iron. It melts the covering and irons it down onto the wood.
This is just another way to do the hinge gaps and it's really very easy. I do both sides. I have been asked if it helps to do away with flutter, beats me, I really haven't ever had a flutter problem. It is just how I do it and it makes my clean up easier without any gaps.