Still can’t figure it out how to switch UV in 3D view for painting, i was pretty satisfied with the diffuse and started to create the glossy UV, but then, wanna make some changes on diffuse and i wasn’t able to get back to the diffuse in the 3D view. Had to work on the UV editor, anyone had same issue and fixed it ?
EDIT: Nevermind, Micheal give the solution right after the challenge 
it’s in the texture panel, just had to switch the image:
