Guys - excellent work going on! Work's had me going a bit bonkers this week, so not as much time to post as I'd like. It's a good problem to have I guess, but frustrating all the same!
Gamera - something I've done when facing those annoying scratches is to hit the scratch with some solvent first to "soften" it up a bit, then brush it with Mr. Surfacer 500. After that, wet sanding with progressively lighter grit. It's worked well for me in the past, and I think the solvent helps alleviate the sharp angles that Mr. Surfacer can get hung up on.
ruddratt - wait - you've never built one of Tamiya's 1/48 Jugs? I HIGHLY recommend giving one a go. I know I say it all the time, but I really think it's one of the best 1/48 kits ever boxed (and that goes for all three - the Razorback, -D-25, and -M (which can also be a D-30+). Looking at your build-up of the 1/72, it looks like it's very heavily inspired by the 1/48, though it looks like the gear bay-to-fuselage bit has been simplified, and if I'm not mistaken the flaps are molded in place.
On the Bench: 1/32 Trumpeter P-47 | 1/32 Hasegawa Bf 109G | 1/144 Eduard MiG-21MF x2
On Deck: 1/350 HMS Dreadnought
Blog/Completed Builds: doogsmodels.com