You can't polish a terd. You need muscle and low bodyfat to look ripped. My brother weighs around 60kg, lean as shit, but has less muscle mass then some girls. So he has the bodyfat to looked ripped, but no muscle mass. The best way to build muscle is lift weight, get stronger, and eat big. If you do not want to look soft, add in some cardio, 10-15 minutes at the end.
Unless your eating lettuce and carrot all day I don't see why you shouldn't get stronger, through eating at maintainance.
Rest as much as you want. I rest alot more now with the extra volume, workouts go for over 1.5 hours, so you need to take it steady.