I personally use future on every thing.. I prefer it over the testors gloss since it protects the base coat so much better. In the end it is personal choice but that's my 2 cents.
The build looks nice, the damaged area is fitting as the whole set up the germans used was prone to this sort of thing. I might suggest some post shading to give the base coat some more life. Of course you can take care of that with some select filters and washes.
Will look forward to the finished kit.