Win or lose, every stroke counts

Well, it's getting to the point when I could enhance it or completely ruin it by a single brush stroke. I guess it's about time I need to go thicker boldly, instead of adding thin layers of glazing. It could literally ruin this painting. But I need to try. Otherwise I couldn't get any valuable experiences out of this painting. I might try different brushes other than filberts. I need to make edges sharper from here.