Good to see some experimenters trying the wrap! You'll wonder why you waited.
A couple of tips from a wrapper:
- cover everything front to back and overlap sheets like tiles on a roof. Avoid bare edges facing forward.
- allow plenty of material overhang (3-4") until you get the hang of the job.
- to wrap your flap, cut a piece big enough to cover it in one go plus overhang. On the wrap where it will lay on the leading edge, slit the backing with a cutter (like an envelope opener). Pull the backing from one half, tack down and smooth one half of the flap. Then pull the other backing and finish the other side. One piece!
- all edges that come to the trailing edge, like your flaps, will be trimmed flush after the film is installed. Run a blade along the edge slicing through the wrap.
- an overlap where sheets meet of 1/4" seems to work well. You do want the overlap to be uniform since it will show slightly when complete.
- at any overlap, use 3M fineline tape to make the clean edges, never cut against the aluminum! Trying to use a precut edge will work but only if everything goes perfect (no shifting or stretching required). I wouldn't count on that.
- any leading edge left exposed (when you can't avoid it) should be sealed with 3M™ 3950 sealer. Goes on like clear fingernail polish (ask my wife ...)
- put the anti-chaff strip on the BOTTOM of your wing skin over the flap. Lasts forever and it won't be seen
Good luck!