After a bit of a hiatus, I'm back on this model. Sanding, sanding, and more sanding. Now I have a small issue - on the bottom of the wing, where I have to fill and sand to remove the control surfaces, there's some fine raised detail that I don't want to sand. Other than "be very bloody careful", does anyone have any suggestions for protecting this area? I originally covered it with Tamiya tape to stop the filler from clogging it, but I find the tape makes it very difficult to get that last little bit of filler..