Hi Skyler95. Try this:
Scenario 1:
- duplicate your image so that you have 2 layers
- apply Adjustment-> Black&White to the top layer
- Switch to the Eraser Tool and erase areas you would like to have colored. (NOTE: You can tweak your eraser brush settings (e.g. Opacity, Hardness) as needed)
Scenario 2:
- switch to the Paint Tool
- choose Mode -> Effect
- select Black&White effect
- paint areas with black and white
Let me know if its working for you.
-Guido
BTW: If your base image is B&W you can paint e.g. with Tint effect or apply a Replace Color Effect to a selection
