HI,
Here's a little bit more helpful advice.
The fitment of the tracks on the right hand side needs some rearrangement.
Study Robs excellent photo example for arrangement advice......
The left rear view of the track alignment appears tilted out to the left. Again, observe the already enclosed picture from Ixion.
If not this time, then next time, you will know a bit more. Know that this build is darn nice for your age and you will only get better every time you complete another kit (and have more funds to work with)
The classic approach to the weathering situation works just as well and costs much less.
That's the way I've always gone about it. Quite often, simpler is better.