I frozen my Merlot grape skins from last falls crush. It does add body and tannins to the woe. Also there is so much yeast in the skins you don’t need to add more yeast. Just some yeast nutrient. What
I have used may frozen Merlot skins from last fall and added the to a Cellar Masters Merlot kit. I also did a 5 gallon kit. Used Pectic enzyme, FT Rough, Opti-Red and BDX Yeast with Go-Ferm. After day 1 added Femaid O then after 1/3 brix drop Fermaid K. Going through malolactic fermentation...