Colored Slime-A new way to use slime in PVP

Slimes currently have a few very nice uses, but they're pretty limited, and I think they could be much better. I propose being able to dye the slime balls different colors, and throw them at players or entities. It would 'tag' you with that color. You could use a single slime ball to change a portion of a player to that color like a paint filled water balloon or paintball, and you could combine 4 balls to make a large slime ball and cover their whole body. The fade time could be a setable gamerule.
The way to dye these would be to throw one slime ball and two bottles of water in a cauldron to wash or clarify it, then adding dye to color it. Slime balls should only be able to be added to an empty cauldron, then the water, and the slime would 'float' to the top layer, getting 'washed' on the way. After dying, the top slime layer could be collected by clicking and getting a colored slime ball, or for a more intricate process, collect the whole cauldron of slime/water in a bucket and cook out the water in a furnace for a slime ball output. These of course would also be craftable into colored slime blocks, useful for map makers and included in an expanded slime block menu in creative (same expanding menu for slime balls). In the education edition, the slime could be collected in balloons, making colored water balloons.
For the PVP aspect, these could also be used in conjunction with scoreboards and structure blocks (when they arrive in Bedrock), allowing you to tag an entire structure and have tag wars.
This feature would allow for combat style PVP, but without any killing, for those who desire such an option.