Detailing question

My dad has a black 99 3000gt vr4 …when it rains it gets spots on it …regular wax wont take it off and this other crap I have from a body shop takes about 90% of em off can anyone gimme any suggestions on somethin to use ? Its all done by hand so anyone know any good products to use on a black car ?

Buffer?

you sure those are just previous acid rain spots?

I have used a buffer before …but Im lookin for somethin to use by hand instead of hauling out a buffer and 4 extension cords

I would say highspeeding it since i work for a detail shop but you said you want to do it by hand so hhhmmm. do you know how to get hold of a pro detail supplier? they carry stuff called acid rain treatment that would get it out but not shure by hand thogh we use it on a high speed buffer and does a real good job and if that does nto work lol it is not coming out with a wax . other thing is call around to body shops and ask about how much to get it wet sanded and recleared if they been in there to long