Gudun polyester mara kyau yana ɗaya daga cikin resins ɗin thermosetting da aka fi amfani da shi tare da kyakkyawan aiki na tsari. Ana iya warkewa a cikin zafin jiki da kuma gyare-gyare a ƙarƙashin matsa lamba na al'ada, tare da aiki mai sassauƙa, musamman dacewa da manyan sikelin da masana'anta na samfuran FRP. Bayan warkewa, guduro yana da kyakkyawan aikin gabaɗaya, ma'aunin aikin injiniya yana ɗan ƙasa da guduro epoxy, amma ya fi guduro phenolic kyau. Juriya na lalata, kaddarorin lantarki da riƙewar harshen wuta ta zaɓar madaidaicin matakin guduro don biyan buƙatun launin guduro, ana iya sanya su su zama samfuran bayyane. Akwai nau'ikan iri da yawa, waɗanda aka daidaita sosai, kuma farashin yana da ƙasa.