chrome spraypaint is a con, it's just silver paint with reflective flakes in them.
for metal parts, you just need to find a place to do chrome electroplating for you. and it's not illegal if you discharge of the waste properly.
for plastic parts, it's possible but much more complicated. usually it involves spraying on a special compound first so that the chrome will adhere to the plastic piece.
if you can find a place that makes headlights in malaysia, i am very very sure they will do chroming for plastic. keep me informed cos i have been sort of looking for years.