Everyone has opinions so I'll give mine. I'm not so keen on Tamiya tape. I've done tests using several types of tape. Most of them work well. The one issue I have with Tamiya is that if you leave it on for a while (I tested them all for 24 hours), you might get some residue from the tape. I use yellow Frog tape. No residue. I don't typically leave tape on that long but sometimes, if there's a lot of taping to do, it might be on for more than 12 hours, but that's just me and my methods. Like Snake, I don't use the "factory edge" either. I have a small mirror that I lay strips on and cut clean edges with a scalpel. I also like 3M Fineline tape for masking complex pieces. If you use 3M, you have to pay attention to your spraying as it is a little thick so it's easy to pile paint up at the edge of the tape.
I agree with Snake. Polishing will make the paint look like a million but the mold lines will be even more noticeable. Also like Snake said, yes, you'll probably sand/polish through the paint there too. I've stripped quite a few bodies in my time and will probably do so again. You really did a great job of laying the paint down for a first timer. Attention to detail with good body prep will make you a great builder.
I made a fixture to hold my variable speed Dremel. The stirrer is a short piece of coat hanger bent 90 degrees at the end and flattened a bit. Works like a charm, no sitting there holding it, and cost pennies if you have some scrap wood.
That feature has me wondering if they have a Tamiya equivalent nozzle? I called my local art supply store and they said $10.95 for an 11 oz. can. Going to try and get something real close to Gulf blue and give the stuff a try. The local carries the Gold and Black series.
Just found one store in the Chattanooga, TN area that does carry the Montana Gold and Black series paints. Headed there soon to check the prices and see if they have a good substitute for Gulf blue. I wish the local Michael's carried them. That 40% off coupon is nice.