Servis Domestic Appliances manufactured washing machines (and later tumble driers). A good solar food dryer may dry food much faster than some air driers. Polyester epoxies are used as powder coatings for washers, driers and other "white goods". Some solar driers can achieve higher food drying temperatures than some air driers. Watermills, cowsheds, corn driers, wine cellars and kilns were typical farm buildings. The most common application of this timer now is in washers, driers and dishwashers. There are laundry rooms with coin-operated washing machines and driers as well. Metal naphthenates have been used as additive driers in alkyd paints. Raw linseed oil is the base oil, unprocessed and without driers or thinners. Oxidative cure coatings are catalyzed by metal complex driers such as cobalt naphthenate. Solar driers are used to dry harvests for storage. Mills either sun dry or use mechanical driers or both. Such commercial mixtures also contain metallic driers to improve their performance. The driers used for varnish are generally acetate of lead or litharge. An excess of driers makes the varnish less durable and causes cracking.