Best compound to get rid of scratches

a fresh foam pad on an electric buffer would be easiest. Just don't lean heavily on the buffer, let just the weight of the buffer do the work. I strongly recommend Turtle Wax ICE products. They have a liquid ICE Speed Compound which should work well for you. They also have excellent wax in T/W ICE Spray Wax, and paint sealer in T/W Seal n Shine. They are all very reasonably priced, easy to use, and super effective.