the reason i ask is ..it was recomended to me...my trusty nissan micra that i have had for 9yrs from new has corroded very very badly on the cross member and so i have to to trade it in....i have now have just bought an 8yrs micra and the cross member is fine for now but i want to prevent it from happening again.....as i need this one too last as long as i can as i am now skint lol
also is it best to was and polish and wax a car every week