Is this a "Daily Driver" or a Show Car?
Is this the "Factory Finish"?
What was the original purpose of sanding the paint.
Factory paint is thin and hard, the MAJORITY of all wet-sanding is done in a body shop situation where extra paint is sprayed onto the car just for the purpose of having more material to work with by the person doing the sanding and buffing. Also, the car is sanded and buffed while the paint is still soft and easy to buff sanding marks out of.Too many people reading about wet-sanding on "other" forums where they don't include the above paragraph and then these other forums give everyone reading them the idea they can simply sand down their car's paint and quickly and easily buff out the sanding marks and this isn't reality.
The safest thing to do is to NOT sand down factory paint on daily drivers. That said, if you've already done this then in most cases it's safer to re-sand with a higher quality paper and a higher grit and then CAREFULLY remove your sanding marks with a high quality compound like our M105, not some compound that's in the same league of the papers you've already used.
Best of luck...