Things You'll Need
Instructions
Designing
Select a character, and find existing parts for your design by browsing online auctions, yard sales or flea markets.
Draw a layout for how you will assemble your Transformer's parts and accessories.
Place the parts together without attaching to make sure they fit and move as intended. This may require several attempts. Return to the previous steps and get replacement parts if necessary.
Design a paint scheme.
Modifying and Painting
Cut parts with a hand-held rotary tool or mini saw with a fine-toothed blade. Clip using small wire cutters or use an X-Acto knife in areas where a saw will not fit.
File rough edges with a metal file.
Attach accessories with super glue prior to painting, because painted surfaces do not allow the glue to stick.
Apply painter's tape to cover areas you're not painting.
Paint using an airbrush, and use a fine-tipped brush for details.
Apply a clear, water-based acrylic coat to protect the paint.
Assembling
Drill small screw holes for attaching parts.
Fasten parts permanently by using ball joints for moving parts and screws or super glue for fixed parts.
Test the movement of your Transformer's parts to ensure free range of motion and proper fit.