You`re right, oxygen bleach may not be the best idea for each and every UV filter. There are so many in use and we don`t know exactly what we`re dealing with, and besides the damage has probably already been done by the chlorine.
Read somewhere Avobenzone (if that is what we`re dealing with) reacts with iron contents in tap water. This could explain the stains getting lighter when treated with acids.
There`s one more thing you could try to tackle the oil base again.
Mix some liquid detergent with lighter fluid in a ratio of about 2/3 of detergent with 1/3 or less of the gasoline. Apply directly onto stains and let sit for a while, maybe 15 - 30 minutes. Then wash with the remaining mixture.
It`s not exactly a green solution and you have to be very careful (mix only a small batch at once, don`t smoke, use in a well ventilated area, don`t use a tumble dryer afterwards, use common sense and so on)
Some here swear by Fels Naphta for greasy stains. Have you tried this already ? The detergent lighter fluid mixture would Fels Naphta on steroids.
Read somewhere Avobenzone (if that is what we`re dealing with) reacts with iron contents in tap water. This could explain the stains getting lighter when treated with acids.
There`s one more thing you could try to tackle the oil base again.
Mix some liquid detergent with lighter fluid in a ratio of about 2/3 of detergent with 1/3 or less of the gasoline. Apply directly onto stains and let sit for a while, maybe 15 - 30 minutes. Then wash with the remaining mixture.
It`s not exactly a green solution and you have to be very careful (mix only a small batch at once, don`t smoke, use in a well ventilated area, don`t use a tumble dryer afterwards, use common sense and so on)
Some here swear by Fels Naphta for greasy stains. Have you tried this already ? The detergent lighter fluid mixture would Fels Naphta on steroids.