Hey, nice looking Abrams. If this is your first tank ever, I would say its much better then the first one I ever built HAHA Anyway, Aside from what has been mentioned previously about washes, pastels and dry brushing, I wanted to tell you a bit about decals. I noticed a couple of your decals appear to be "silvering". To apply decals so they dont look like decals, first mask off all clear or reflective surfaces. Then, spray the model with clear gloss coat (model master has some inexpensive gloss coat). Once the gloss coat is dry, apply your decals. They stick much better to a glossy surface. After your decals have dried for a day or so, apply "dull coat" to the whole model. Once the dull coat is dry, you can peel off any masking tape you have on your clear or reflective surfaces. As well, this double coat of clear paint protects your base color for upcoming washes and drybrushing. Have fun and nice job!