You could try nail varnish remover or paint brush cleaner (white spirit) or maybe white vinagar but do test to see if effects the paint first in an area out of sight first.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local