There are some products for acrylic tanks but what you should do first is fill the tank up and see if you notice the scratch. I used to have scratches in my glass tanks and when the tank were filled with water you hardly noticed them.
I wouldn't worry about them as over time you'll get even more scratches from just cleaning the glass and picking up a piece of sand or gravel. Also fish, starfish or snails will eat the alage off the glass and leave little scratches. Also actually it looks quite worst when the tank is empty as the scratches are more noticeable.