Here is a little parts swap project between Prowl & Smokescreen. I swapped the missile launchers, thighs, and forearms. After the parts swap I did a little paint work on both figures.

After the swap repainted the forearms, touched up all the black seams, painted the rest of the front bumper black, painted the back of the launchers black, and the antenna on his head a brighter red. Also now you don't see all the white gaps in the lower black stripe on Prowl in his alt-mode.