Do not use acne medication on your penis, unless you like be sore for a number of days. The skin of your penis is much thinner than the rest of your body, so medications designed to soak through the thicker skin of your face will be too powerful for the skin of your penis.
Because the bumps are not red, I doubt very much that it is acne anyway. What I think you are seeing are the glands in your skin. The skin of the penis is so thin that you can see a ways through it. And because it is thin, glands under the surface cause push it up to be seen as small bumps.
What you are probably seeing are the sebaceous glands. They produce the oils which keeps your skin soft and flexible. When you are a teenager, your increased hormones while you are growing causes these glands to step up production, so they get bigger. In a few years things will slow back down and they will get smaller. The common name for these small bumps are "Fordyce spots."
They cause no harm, but you are causing harm trying to break them. You are injuring your skin and giving bacteria a chance to enter your body to cause real harm. Just leave them alone. They are normal and can be seen on most men's genitals.
If you think that I might have missed my guess or that you didn't describe something well enough, you are welcome to send a close-up picture of the bumps and I'll research the issue further.

