It is what it is with foliars, ya know? Even something like neem oil is going to leave a discernable difference on the surface where it was applied
not sure of your solution or the contents of the solution exactly or who/how it was mixed but in the future you can try some natural surfectants making a batch up right before use...stuff like aloe is a good natural option for a surfectant
I'd leave it, sulfur is best through foliage IMO anyway