definately sounds like acne yes.
apparently the plastic / stainless bowl thing is well debated amongst breeders, some say yes other say no. If the plastic bowls are washed properly they shouldnt be too problematic, mine go through the dish washer after being washed out in sink every day.
Cody had this mild in his first year but has grown out of it .. i believe this is common
The old treatment used to be to rub surgical spirit on, it works but not pleasant for the cat, you could also wash with hibitane solution, I just used to use cooled boiled water on cody.
Just watch out it doesnt become too severe as thats when secondary infection can set in and need extended courses of antibiotics.