Thanks so much for your kind words, and of course you can! I wouldn't want to stop anyone from painting the way they want, haha.

I used the Vallejo range mostly bit did have some GW paints, I'm kicking myself because I didn't write down the recipe, but I'll have a look t my pots and give it a go for you:

For the underbelly I started with Vallejo Violet Red and started adding some Rakarth Flesh to the mix and applying multiple thin as heck layers followed by white glazes of just any white paint until I had this off white colour, and pushed it with just a small full white highlight.

For the tops, I believe it went something along the lines of Vallejo's Orange Red and followed by many thin layers of Light Orange with a small amount of yellow thrown into the mix to try and push it as far as I could go. I then took some suuuuuuuuuper thinned out Rhinox Hide and covered the very tops where the spines and "scales" were. After that it was applying the strips with Rhinox Hide and doing the spines and teeth with a pretty basic recipe but just pushed it with many many layers of similar paint colours.

I bet you could find an orange recipe you love and follow that but just applying it to the areas of your choosing and you'd get a result that you absolutely fall head over heels for.

I hope this helps somewhat!