most modern touch up paints are acrlic , but there are differences between different manufacturers of the product ! ive always found the hycote brand to be very good , as said before test a small area first . if you have a reaction thteere is an isolator paint availible through the automotive refinishing trade by the name of barcoat this needs to be sprayed onto the old / reacting paint before you can repaint . any problems please ask as i trained in automotive refinishing .