Remove as much as possible, then use a commercial stain remover. Should this fail and the article will take it, testing first on a seam, use a little liquid lighter fuel. If article is delicate, neat washing-up liquid should be rubbed in then sponged off with warm water. Wash as normal.
Remove as much as possible then dry clean.
Remove as much as possible Scrape off where plasticine has been trodden into carpet, then use a commercial stain remover then shampoo. Treat furnishings as non-washable fabrics.
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