Having run Renault 4 since 1973 I have learnt most of the tricks,I suppose!Have had 5 of them over this time,but only one rusted out(rear suspension trunnion mountings-not worth repairing then) Others crashed,or killed off by overloading & really hard work.My present one belonged to Robert Wyatt & partner Alfie Benge-bought from them as an Insurance Writeoff,& roughly knocked back into shape.Have done about 465000 Renault 4 miles-still get a huge buzz at the wheel! Also into British salmson cars,Austin 7 specials & have an Ariel single motorcycle