When someone simonizes something, they make it very clean and shiny, especially a car.
If someone simonizes a car, it usually means they want it to look very nice and new.
Examples:
He simonizes his car every weekend.
She simonizes her bike to make it look new.
When I grow up, I will simonize my own car.
He simonizes his toy car to make it look like a real one.
She simonizes her bike every day to make it shine like the sun.
I simonize my toy cars and they look very nice.