A really quick and effective technique, end result is really beautiful! Although I would prefer to put stickers - after - weathering, then a final top coat. I think that the washes with black over the stickers edges really make them stand up even more.
Disappointing that a model of this quality didn't come with water slide decals. I had the same reaction to Barbatos. Lovely build, very beginner-friendly. I'm going to direct my friend here who is just starting to try customize.
Thank you for your comments and recommendations to your friends. I hope too include water slide decal in RG. Realistic decals are thicker than water slide decal. However, it is easier to paste than water slide decals, so even beginners can easily upgrade the details. I am glad that it will be a reference for your friend's customize.