White school shirts stained by acrylic paint. Help!

[Handbaghag]

My son did an Art GCSE mock this week and dripped the acrylic paint/water mixture onto his (new 😲 white shirts) which have now stained. The fresh acrylic splashes have come out but not the drops from the brush when mixing/cleaning. (Before anyone mentions the word apron, you clearly don't have a 15 year old boy 😜)
Any top tips for removal? I've tried fairy liquid, rubbing alcohol (although don't really know what I should do with it..)
Thanks x

Maybe Ace bleach for whites? I usually find it in Poundland.

Have you tried vanish? And then perhaps putting it on the washing line to bleach it in the sun.

I would just let him wear stained shirts.

Watching with interest... one green spot right in the middle of the (very expensive school logo) polo shirts after last week's mock. I've tried vanish and sunshine already....

Let me know if you get it out.

I have a brand new pair of brown striped trousers with a large amount of yellow paint down the back of both legs where someone dropped a freshly painted box.

A blue and white fresh looking top which now has random splashes of green and pink on it.

A shirt with dark blue on the sleeve.

Another top with purple on it and black leggings with bright blue splatters.

I work in a school, can you tell? I have managed to get some paint out by soaking immediately and then putting through wash but if it was put on in the morning and dried there isn't much hope I am afraid. Nursery teacher managed to get some out with Stain Devils but said it took more than one wash. The yellow and the blue seem to be the worst. Good luck.

Try a clear alcohol - eg Vodka. I have had success with this, and is cheaper than buying other products.