I think it’s a great idea. I made up a separate 8oz spray bottle and sprayed the leaves before they went into flower. They might be a little small now though.
Spray them at the end of their day so they have a 4+ hour stretch with lights off while the solution dries. Light shining on wet leaves can cause discoloration.
There is one product I can recommend for your grow that would be perfect for them right now. Optic Foliar Overgrow, just in veg. I’ve seen what it does myself and I won’t grow without it.
You would thank me ...
Amazon product ASIN B00E4B3TBI