A day or 2 after its painted will be fine, chances are it will be fine as soon as you get it back as it will have been done at least a day before you get it back anyways 👍
I bought my kit from keri a few years back luckily when they were in stock and recently last month ordered discs and pads which came the next week so cannot fault Keri's service at all personally and the fantastic kit to go with it!