I give you high marks for attempting to build a Smer kit alone. Overall not bad at all, although you suggestion to not hold back on comments indicates to me that you're asking for advice. I would make the encouraging suggestion that weathering in general is most convincing in small amounts. It's good that you tried out several different methods to achieve your weathering goals, this indicates you're not afraid to experiement. We don't learn to make the omelette unless we're ready to break a few eggs. Overall I'd have to say your weathering was a general success, but on your next project, I would suggest to scale down the application of the salt (perhaps try a finer grind of salt, and place only in a few "key" areas, such as along walkways, etc.), and apply the weathering pastels with a finer brush/Q-Tip to specific areas, such as just along panel lines, then wipe off all excess before sealing the model. The trick to successful weathering is to have the appearance that the plane is used, but in flyable-but-not-neglected condition. You're very much on the right track, however. But above all helpful suggestions, this is art and your personal satisfaction is more important than anyone else's, so don't be hesitant to follow your own taste.