Your best bet is to apply a paint removing gel or paste with fabric strips.
How to remove paint splatter from aluminum siding.
Using a paint brush apply the paste to the aluminum frame.
If it is use it to remove the paint.
Rub the paste onto the paint stain and leave on for a few minutes before using a soft rag to scrub it off gently.
Any splatter can then be removed with a water hose making the cleanup extremely easy.
Take the razor blade to any remaining paint left on the aluminum siding.
Scrub the paint with a soft bristle scrub brush.
It was good as new.
Oxiclean spray oxiclean spray makes both a great laundry pre treatment product and a general household cleaning spray.
Mix strong detergent such as trisodium phosphate tsp with warm water in a plastic bucket.
Repeat the process as many times as needed for the paint to be removed.
Let the mineral spirits sit on the paint for a few minutes.
For my paint drips i sprayed on oxiclean and waited for about 15 minutes then returned and rubbed it with a scrubber sponge.
Allow the product to stand.
If the area is large the paste can be applied with a roller the paste dries extremely fast and can be applied the day before or hours before a concrete pour.
Latex paint is water based which means you can use water to remove latex paint spots especially if the paint was just recently dripped.
Put on a pair of latex or rubber gloves.
The process involves saturating a soft fabric with the gel then placing it over the brick.
A razor blade can remove the rest of the paint if the last two steps do not complete the job.
Wipe the mineral spirits over the paint with a cloth.
Rub a generous coat of the soyclean paint stripper on the aluminum siding.
Additionally consider using acetone or thinner to remove paint stains.
Then use a regular hose to remove the paint and stripper from the aluminum siding.
What will remove latex paint spots from aluminum siding.
How to remove deck stain from aluminum siding.
Saturate a rag with mineral spirits.
How to remove dried paint i poured a little bloop of rubbing alcohol onto the main marks and left it to sit for 30 seconds or so.
Then i just wiped it all around with a paper towel.