Ok, I got a Haze Bomb with the Damage vs. Gremlins: Medium UV on it. I've already got the recipe to turn into a Fiery Vaporizer. What I want to know is it guaranteed that it will keep that UV? Is it possible for it to gain a new UV and lose the old one?
If you check the box you will keep the UV, if you don't you'll lose it and have a (quite low) chance to gain a new one.