Kupenta pamwamba pa ma motors nthawi zonse kumatsata njira ya "zopaka zamagetsi zotentha" (mwachitsanzo, malaya awiri a epoxy red iron oxide primer yotsatiridwa ndi malaya awiri a amino alkyd baking varnish). Chovala choyamba cha red iron oxide primer sichinaphikidwe chifukwa makina amatha kutsatira, ndipo panali kusiyana kwakukulu pakati pa malaya oyamba ndi achiwiri kuti awumitse. Chifukwa chake, choyambirira sichinaphike. Chiyambi chachiwiri chinagwiritsidwa ntchito pokhapokha kukhazikitsa ndi kuyesa kumalizidwa, ndipo zonse zoyambira zachiwiri ndi ma vanishi ophika a amino alkyd awiri otsatira adawotcha. Njirayi inkatsatiridwa mosalekeza popanda vuto lililonse.
Ndi chitukuko cha luso la mafakitale, njira zamanja zokha sizingakwaniritse zofuna za msika. Kupenta kutsitsi kwasintha kuchoka pamanja kupita ku njira zopangira makina, ndikuchulukirachulukira kwa makina opangira. Chifukwa chake, mizere yopangira utoto wopopera ikugwiritsidwa ntchito mochulukira, ndikulowa m'magawo osiyanasiyana azachuma chadziko. M'dziko langa, makamaka kuyambira kukonzanso ndi kutsegula, zida zopenta zopopera zakhala zikukula kwambiri.
