Baron Zemo was made using one of the many Spider-Man figures I had laying in the parts bin along with a random holster, the furry sleeve cuffs from the Street Fighter Cammy's coat and his headpiece is a repurposed belt from The New Mutants Magick. The rest is paint and markers.
A Custom A Day....
I began toy collecting as a hobby back in 1990 I have always had a
need for custom figures. Toy companies begin action figure lines, begin
to release individual characters to create teams and, more often than
not leave them incomplete. Many collectors find that custom figures
pollute their collection's authenticity by not being mass produced
creations from the toy companies that created the preexisting toy lines.
I disagree. I feel a quality custom action figure enhances a
collection and help create a complete picture.