A recent post on a blog I look at was going on about sanding sticks. Now, I have seen these mentioned so often on forums, especially those where plastic kits are the main subject matter. People sanding back new shapes from gouts of fillers, usually entirely unsuitable fillers, too.
Now come on chaps, man up a bit, eh? Use files! For Heaven's sake that's what they're for. Removing stuff you don't want. And the main thing is that being hard and generally flat they are completely controllable. THEN, if you've cocked up a bit and who doesn't, sand the scratches off with a bit of wet'n'dry held in your thumb and forefinger (very controllable) or if you must be a bit finicky, stick some to a bit of styrene, cut to a shape to suit you. It costs nothing, rather than a Fiver a pack from Albion Alloys! If you don't want to invest in files, get some of those file shaped things with diamond dust all over them from Lidl's for a few quid a pack. They're very good on plastic as there's no pattern of toothing for the plastic to steer where you don't want it, which can happen to files, even fine ones if you're not concentrating like you should be.
And if you need to fill anything, get some Milliput in there if it's a biggish gaff. Otherwise use a filler in a tube which is similar to cellulose putty. Perfect for all scratches. I nicked some from Volkswagen's when I worked there in 1997 and I still use it. And please, don't use that ghastly white stuff. Yellow-Green Milli is all you'll ever need. It polishes to a glass-like finish for vac-form patterns so why do you want to pay more for the stuff that never goes off properly and chalks in your fingers?
And for plastic kits, guys, that is all you'll ever need. No fancy, pricey, trendy, forum led tosh, just good honest stuff you can either get for pennies or make yourself. The only other thing you need is a bit of acquired skill, experience (always helps) and common sense. Not even patience. I have none whatsoever, which is why I don't torture myself with kits.