Hi Gerry. When I look at this model, I see two areas that you should consider for future models, and will make a huge difference, in my humble opinion.
The desert sand colour is very monotone as it is. A scale model cannot reflect light and cannot cast shadows like the 1/1 version. There are many artistic methods to imply this like washes/drybrushing, pre and/or post shading, colour modulation, etc. As well as immitating the natural colouring we see, it also helps details stand out and adds interest to the model.
There are many schools of thought when it comes to chipping, and "to do or not to do" is not of interest here as we all have diferent opinions. But one thing is for sure, when chipping, some thought should go into where one should chip. In your model the turret appears to be as chipped (if not more) than the hull and lower hull. The chipping should get gradually lighter as the eye travels up the model. Of course there are areas on the uppermost details that can get very worn, but these are specific and not as random as shown here.
Both of these comments are meant constructively .. hopefully you can accept them as that. I see your results getting better model after model. With a little more "love", you can easily go up a few levels in finish qualty.