Question, are these buds still on the plant? Or are they already cured?
There are a number of possiblities either way.
If your "little buds" are on the plant, using a foliar like "Chi" and some sort of "Nectar" or "Sugar" type product in the nutrient mix would bulk up the buds, and add resin glans possibly.
If it is already off the plant and cured, you don't really want to spray anything on it. If you don't like that answer, try something light but not beyond the classic sugar water solution, this will make it some what sticky, and cause very little problems for any future smokers. I still wouldn't suggest it, but it is better than, a direct glue, glucose, or adhesive spray of ANY KIND. DO NOT USE GLUE OR HONEY! ! !