The Dinky Toy company was created in 1934 and released die-cast car models from that period until the early 1980s when its British division closed. The company name was later sold to a Chinese company that also holds the rights to Matchbox and other car lines. The die-cast models became a popular collectable for toy car and truck enthusiasts. Restoring these models requires specialised techniques that also work for most other die-cast models.
Place the model in your polythene bucket. The bucket must be polythene as caustic soda will eat through tin and other weak metals.
Use your brush to remove the model and inspect for paint. The caustic soda should quickly dissolve the paint and you can brush away any remaining flakes. This may take longer for larger models.
Rinse the model and brush with cold running water once all paint has been removed. Make sure that all of the soda water is gone and the model is fully dry before you begin painting.