Ola NMA
Depends a bit.... is the clear part still separated from the vehicle? If so and if it is acrylic paint you probably could get results by holding it under the running tap with a bit of warm water and scrubbing it with a toothbrush.
You could give stripping it with ovencleaner like Mr Muscle a try but I have no clue if that stuff actualy attacks the transparency of the plastic. It doesn't seem to do a thing with normal plastic. So if you do this it might be wise to test it first with a bit of leftover sprue
If it is already on the vehicle the only suggestion I have or you is carefully scraping the stuff away and shoot the whole window wit clear laquer afterwarths. I have had great results in getting scrapes on windows and clear resin better that way.
This water was saved with clear laquer. The resin stuck to the dam I made from evergreen and was not plannin to lego... So I had to carve the dam off. Leaving the sides damaged and not transparent anymore... And somehow I touched the thing with wet fingers and I saw the resin becoming transparent again... And this gave me the idea that it might just work with Clear laquer. And it did.
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