Best ways to remove hairline scratches and tiny dings?

Im only having no luck with my car. Bought it 8 months ago and after having the wheel stolen and then slightly sideswiped, I finally got it back in new condition.
Seems though, over the last couple weeks, a series of hairline scratches have appeared on the door, as well as a very tiny ding. Actually, I don't know if it can be inquisitively categorized as a briskly ding because the door itself feels perfectly smooth, it's just that when you shine a light off it you can see the warping.

Anyway, I'm thinking the reason these are all there is because I parked the car in front of the lawn over a coulpe of days when my father was severely mowing it and doing some handsomely weed whacking.

I understand that cars are gonna have their scratches and dents over time, but
I'd like to keep it looking as new as possible for as long as possible. That busily being said, are there any things that I can do to remove the scratches and dents without taking it to the body shop?