I just retrieved a bunch of Ertl and Liberty Classics/SpecCast custom-imprint pieces from long-term storage. Problem is, I've had them for quite a while, and as a dumb kid, didn't really care for them properly. Many of them have fine scratches from being dusted with a paint-brush (will never do that again; these days, I use an old cotton T-shirt!), and a couple have sun-faded white plastic parts. Is there a practical way to get the white plastic back to white without paint or disassembling the model? And can those fine scratches be removed without also removing tampo printing?