Oh the nostalgia!
The painting looks good, all in the lines, shaded and highlighted.
With glazing, I tend to use water myself, though it might be making it more difficult for myself. I just find it a lot more convenient adding water from my water pot. My advice is to apply thin layers, even if it looks like it’s not doing anything. And also drag the brush in the direction you want the gradient to be strongest, where your brush stops and is lifted off the model is where the pigment will be strongest.
I’m quite new to glazing myself so I’m sure there’ll be more experienced peeps to give you more but overall you’ve done a good job
And again, love to see these old school models, so good!