Tango, don't..! The way I did it seems to be working (can't be 100% certain until after 1st primer coat though!). Make sure the putty you use can be smoothed over with nail polish remover first. Tamiya's is. The one I use too, but it's a German make I get from a Belgian automotive shop).
Apply some putty onto the 'sunken' area, let dry then use a rag and NPR to smooth it over. Work your way from side to side across the axis of the 'sunken' area. You'll get a 'flat' wing without any need of sanding. Sanding would damage all that fine engraving over the wing, in particular the oval engine access points... You'll only need the putty outside the panel line that delimits the 'engine area'... Apply the putty in a line that's just about 1cm wide outside that panel line. The NPR technique will deposit a bit of putty into some of those recesed lines but once dried, use a Q-tip with a little more of NPR to clean them up. Over the 'sunken' area, you'll have to re-engrave with a fine blade. Not too hard.
I've just 'closed up' the wheel wells with plastic card and will 'furnish' the inside with wire and various little bits of plastic. I have good detail shots of the legs, but none of the inside of the wells, so I'll just make do with my imagination... Had been thinking about opening up and deepening the nose wheel well, but I think I'll pass on that one... The doors do not let much room for viewing what's inside anyway.. All wheel well doors could benefit from being thinned down by the way!
I noticed the instructions show you to put the nose down in an angle that's way too large... Pictures show that in the nose down position, the nose is not that low, with the bottom of the nose making an angle of about 5 to 6 degrees with the bottom of the fuselage just behind that area. If you do put the nose down, there's some work needed on the front window of the cockpit. Revell has you to put one piece of transparent plastic but the shape of the window is not right (and there's 2 windows, not just a single one... and they are not on a single flat panel but each on a panel that's angled from the other. I have pics, if you need info on that...) Also, from the pics I have, the inside of the nose under the sliding canopy appears to be painted in a kind of dark sand colour...
Brian - I have, somewhere, pics of 01 aircaft that's preserved at Duxford. I took lots of close-up pics of the wheels, legs, exhaust,.. I'll see if I can find them again...