Doing a lot of reps tones your muscles, which makes them look nicer, but you need to have the muscle already there. try doing only a few reps with weight that's very heavy. If you have a spotter, bench about 50 pounds more than your max and have them help you get it up after you let it down all by yourself. do that after a workout and it will put memory into your muscles (yes, muscles have memory) to help them adapt.
Another thing is that bench press and butterflys work your pecs more than your arms (depending on the width of your grip on the bench. I try and go for a wide grip)
Also, your muscles need plenty of rest, you said you do all of it everyday, in actuality you want to give your muscles about three days to rest. My schedule is as follows:
Day 1: I work my pecs (with stuff such as benching and butterflies) my triceps (benching and any act of throwing or pushing something down with your arms out in front of you) and my shoulders (Tons of shoulder workouts)
Day 2: Abs, Biceps (I like preacher curls, that's when you have the back of your arm against something and curl it up. there should be a thing for it at your gym) and my back.
Day 3: I work my legs, squats for quads, bounce up and down with toes for calves, leg curls and kickers.
I just repeat that schedule through the week. Taking Sunday off. Good luck. Try to run everyday too, fat can cover up muscle if you have any.