Thanks for the tip on using Mothers Black to Black. The rubber strips around my boat were looking sad with no amount of polish overcoming the white or chalky haze. Also the two rubber bumpers on the swim platform were also looking very tired. Over the last few days I have applied the Mothers product twice. Applied generously and rubbing it in. The railings came back from about 40% to about 80+%. Still not perfect but MUCH better. Absolutely worth the little effort. Regarding the rubber bumpers at rear I took them off and reversed them then applied Mothers. They have come back almost new or 90+%. A very good result. I will now detail once or twice a year noting we use our boat all year.