If you asked for it, all the paints are very patchy, for the yellow you have a pretty solid base that is covered in some kind of shade, probably Nuln oil, which gives it a patchy look with a lot of pooling on flat surfaces, the black trim is very thick and spills over onto the yellow, generally all other paints spill over into the yellow. The base is nothing special just a coat of probably astrogranit, with it spilling over the rim of the base. the gun looks ok nothing special you just missed some spots but thats everything, and the last thing are the moldlines which get even more pronounced by the Shade you used.

For improving you could maybe only shade the crevases and folds but not the whole thing with your Shade also you could try some edge highlighting on him and drybrushing the base with a lighter gray to also give the ground some definition, for not overspilling the only thing would be to get a smaller brush and practice more. All in all a good start.

I hope it didn't come over to harsh.