I never had a professional experience(aka paid experience) for this type of job but I have a lot of experience doing it. I am a fan of Kpop and Jpop as a fan I do a lot o fanarts, doing those fanarts I always make sure that I credit the source material by putting their watermarks on my fanarts. But sometimes watermarks have low resolution so I convert them to a higher one using my favorite tool; vector.
Since I'm just new here on this site I will give a great deal; Instead of just converting one design, I will convert four for the price of one. Yes! Converting four designs for only $3.