I created my Deadpool entirely out of a Marvel Legends Hand ninja. I filed down the chest with a dremel tool and resculpted the chest and back. I then did a lot of dremeling on the head and removed the hood around the face. The belt is just a bunch of Maria Hill belt pouches glued to his waist and around his leg. There is no actual belt it just looks that way. I was satisfied how this came out being my first custom figure. I cut the hands to be open and so the finger would go on the trigger I used Testor Paints and sealed it with a non-shine semi-gloss spray paint. His joints were red already so I didn't have to worry about popping him apart to glue paint over the joint hinges to keep the color from wearing. The sword sheath on his back came from a TMNT Leonardo - I sculpted onto the end of it so that the blades wouldn't hang out at the ends. My Deadpool has a side arm and a hold-out pistol holster on his ankle. His belt buckle is metal, made it out of a rivet. The silver thing by his sidearm at his waist is a silencer - I know he doesn't use them often but I figured 'what the hey' and added one.
UPDATE: Added some trim to his suit's lines, and added an extra Marvel Legends Deadpool 2-pack head, because I dig the sculpt but thought the body they gave him wasn't has built as the Deadpool I'm use to seeing in the comics. Hope you guys enjoy the update, and the non-blurry pictures.