Finding an existing figure of the Toy Biz size that would work for the Professor proved to be quite a challenge. After much searching, I found a set of figures called "Sam and Twitch" in the line of Todd McFarlane Toys that features "Spawn". The "Sam" figure was the best I could find. There wasn't much modification needed in order to make him transform into the Professor. All I had to do was remove his existing hair (that pops right off!) and sculpt him some new hair using Sculptey (which you find at any craft store). Sculptey was also used to create the vest to Arturo's suit. An Exacto knife was used in order to make the sharp edges where needed (such as the inside angles on Arturo's vest). The tricky part was the painting (especially concerning the beard) which was done using normal acrylic paints and a trusty brush.
Sam and Twitch are copyrights of Todd McFarlane. Professor Maximillian P. Arturo is a copyright of Universal Studios and St. Clare Entertainment.