how to get Magic Cushion off the horse's skin

[Silver-Dove]

As title really - my boy has got Magic Cushion in his feet due to lameness, anyway, he has it all over his belly and on his elbows where he has laid down, it is rock hard and will not brush off

Does anyone know how to get the stuff off, ive tried everything ???????

 

[Spit That Out]

Try white sprit on a sponge otherwise it might need clipping out!