Thank you so much for your kind words @DMY169 ! 
So, how did I do that… If I recall correctly, I used some different brush blending modes, mostly Geometric Mean, some Colour Dodge and quite a bit of Grain Merge. The latter can make colours really pop, I love it! Maybe some Hard Light too, not sure…
The other thing is, I use often edge detection filter to emphasise the textures. I’ve described the technique in this post. If you have more questions, feel free to ask.
cheers!