Ahoj Lukáši, many thanks, sir!
@George: great idea, for sure worth trying, many thanks! CA is clear, but what does PVA stand for?
@Pietro: I am not sure, what you mean and google did not help either. Do you mean the radiator could be made using the same method as is used for the louvred door panels?
Once again many thanks to all for your support and ideas!
Cheers
Ondra