I am just about finished the actions for this. (All the actions are complete, just organizing them, proofing, etc).
You can find them free here:
https://github.com/dumbgamedev/postprocess_playmakerThey do also require the use of Keijiros script, called: Post Processing Stack Utilities. Which works as a sort of bridge.
https://github.com/keijiro/PostProcessingUtilities . What is does is clones the post processing stack settings at runtime, so that the playmaker actions dont permanently change your settings. (Ie, we want things to go back to default after the game is stopped).
This set of actions was funded via my Patreon account, so shout out to everyone there:
http://patreon.com/playmaker . The more people who pledge, the faster these things get done and the more sets I can push out.
I am working on a quick tutorial how to use these actions. Should be done pretty soon.