Paint should be reapplied only as needed. Also note, unfinished wood like teak will adopt a gray sheen over time. Do not worry; this process does not directly harm the wood in any way. Rather, it is the sun’s natural patina process fading the wood into an aged, mature look. If that’s not your thing, make sure you keep up on the varnishing.
These chairs are used widely by people in all walks of life though; it is most popular among the elderly and parents of infants. The elderly find great comfort in using them as they can rest and rock themselves to sleep without having to lie down. New parents find they are perfect to calm a fussy and crying baby.