So, you don't deny that weather mods happen. How exactly do they do a weather mod mr. expert?

If by "Weather Mods" you mean 'Cloud Seeding', no one has ever said it does not occur...

What chemicals are used in weather mods mr. expert?

Silver Iodide, dry ice, and to a lesser extent, propane gas...

[link to en.wikipedia.org]

What devices and craft are used in deploying these items mr. expert?

Someone prviously in the thread linked to a company that listed their planes...Propane is usually released from the ground in mountainous areas such as the Wasatch of Utah...

I guess you think they use a hand spray bottle from the ground or is it mixed with pixie dust and magically transported into our sky?

No, but it's apparent you think along those fantasy lines...