Waterlogged Copper Grates should create rain particles

Waterlogged copper grates should emit a rain particle down which would function to create artificial rain, functional showers (waterlogging the copper grate with dispensers and simple redstone) or just better looking greenhouses!!! anything you want

the oxidation level can change the rate of the water drop particles, so the more oxidized it is the more 'clogged' it becomes and creates less water drop particles