not that simple without more info, loads of options water based paint/solvent based...wet on wet ....then theres icocynates....
Isocyanates are potentially dangerous irritants to the eyes and respiratory tract. No matter which chemical is used, all isocyanates must be treated as a highly hazardous chemical. The greatest risk when dealing with these chemicals involves inhalation of the fine vapours or droplets which irritate the nose lungs and thorax. Increased exposure to isocyanates can lead to sensitization causing workers to experience asthma attacks.
Common health effects caused by all isocyanates include eye irritation leading to watering and discomfort. Dryness of the throat and chest is common and difficulty breathing results from constant exposure, especially when in high concentrations. When the chemicals come in contact with the skin, reddening, swelling and blistering will occur and persist until completely washed off. Dermatitis is also linked to excessive exposure of isocyanates as well as liver and kidney dysfunction.