For the past couple of months Ive been using these two videos to clean my saab 95 engine bay. The first link shows you how to actually clean your engine bay really really well, and the second shows you how to paint the valve cover and exhaust manifold heat shield (I think thats what its called). I just used the second video to repaint my exhaust manifold heat shield silver again. Hope these help!

Engine Bay Detail- https://www.youtube.com/watch?v=PRSoRkM8GcM&authuser=1
Valve Cover DIY Paint Job- https://www.youtube.com/watch?v=hdAz1pNn4yQ&authuser=1

If those two dont work, try these links
Engine Bay Detail- https://youtu.be/PRSoRkM8GcM
Valve Cover DIY Paint Job- https://youtu.be/hdAz1pNn4yQ