Yes of course can you plate chrome on die cast aluminium. But there is a problem with the hydrogen gassing in the chrome solution, this hydrogen gassing will helps the chromium deposit to get a bad adhession. Start with a non etch cleaner. Second step is a etching cleaner.
Third step is a hydroflouric acid etch.
Fourth step is a nitric acid. Fifth step is a zinkate etch. Plate chrome or get a nickel deposit on the part before chrome. It is not possible to diagnose a finishing problem or the potential hazards of an operation via these pages. All information presented here is solely for general reference and does not represent a professional opinion nor the policy of an author's employer.