Some of which are taking a while to clear she has some thuja cream but it came without instruction is it corrosive or soothing as she wants to show the yearling this year and doesnt want to make things worse
Try Thuja tablets instead. I gave them to my arab and the warts just dropped off. Having said that, I doubt she'd be marked down in the showring because of warts - I wasn't.
Juvenile warts can appear in their hundreds but they are just an outward sign of an immature immune system. As hayinamanger said, they will vanish of their own accord with no assistance whatsoever as the horse's immune system develops. Having said that, Thuja cream at 30C potency is as gentle as anything and no harm will come from applying it, even though it's completely unnecessary!