In no way am I an aviation expert, however, those holes you mention - along the leading edge may be for venting flow of hot engine air for de-icing purposes. Not saying that this is absolutely what they may be for, but I've read that 757's have one inch holes grouped in sets of three along their leading edges for this purpose.
What type of planes are you seeing these on?
Can you get an image and post it here; perhaps there are others who would be more knowledgeable as to what they would be for sure.
There is nothing to say at this point that this existing system could not be tied into secondary devices for dispersal - just say'n.
What I was referring to can be viewed here:
laminar Microjet atomizer The system/methods are going to be differing from those used by "fully" converted planes such as shown below - interior of Corexit chemtanker --- the technology has been around for quite some time now, commercial planes won't be as "in your face" as this. Your gonna have to dig below the flight deck and interior of the wings to find out what is in your companies planes.
As far as the "over reading" on the fuel capacity, can you elaborate a bit more. It has been extrapolated from SO4 estimates(Aurora Geoengineering Report)- that it would require only 7.5kg of alumina (@ 4X the efficiency over SO4)to create a persistent visible contrail that would reach from horizon to horizon, viewing a jet at 35,000ft - from ground. The problem with this scenario is that if the fuel was doped it would not be controllable, accounting for what many have witnessed as selective on/off spraying regardless of atmospheric conditions (super saturation)that would promote persistence - which is rare in occurrence in many witnessed and video testimonials.
Thanks for your concerns, it means you care.
Maybe, take a swab of those little holes and put it in a sterile glass vile at the same time you are getting some pics - just for curiosity sake!