23-04-2018, 09:09 PM
For years I ran a brush painted 1950s car. The brush work was not discernible but the enamel much less durable than modern car paints and, parked all day outside, it needed polishing every few months. Hard work as oxide film formed. The car was superseded and ended up outside with mild intention to reuse one day. About once a year I washed off the oxide and wiped with cloth dampened with boiled linseed oil. Much less effort than polishing. Although it soon oxidised, the underlying paint remained very good for many years.