Colm the pros use a more acidic product than vinegar believe me. What is used is also used to remove concrete and industrial fallout. The type of stuff you need rubber gloves on when using. Makes vinegar look like lemonade.
A 50:50 mix of distilled water & distilled white vinegar is harmless once removed after a minute or two, then the area is shampoo washed. This is the way to remove light water spots from paint and it is recommended by some of the leading pros in the industry. It will do no harm once done properly. Solution not allowed to sit too long and dry out. The area will have to be polished and waxed afterwards but this would be the case with any colour. The most important thing is for the OP not to touch the paint anymore than is possible as it is the friction generated by rubbing the debris and or with a cloth or sponge which does the damage.