dear these products designed for genral public whoes dont have much experties for detailing things and experince so these kind of products are very mild in nature so in experince person dont spoil the paint by wrong use.
these scratch removers like scratch x is mild in nature u just need to be patience with such products, need many many soft wipes on effected area may be 100s but with soft hands , once product dry out , reapply
other option professional range compounds and polishes but u have to be very careful while using them