The comp rules say that you can use an already painted mini if you strip it.
I assume priming over the existing paintwork would also work. I take it that the point is starting over from scratch - although this is a grey area (imho) because it suggests that you could paint a previously assembled/converted model.
1. All entries must be started from new. Example: This means nothing half built, or something that has been on your shelf for a few months gathering dust. A Primed mini, or one that is about to be stripped would be ok though (so long you actually strip it)
The reason for this is, having something already semi-finished is an unfair advantage - especially for Terrain.
I assume priming over the existing paintwork would also work. I take it that the point is starting over from scratch - although this is a grey area (imho) because it suggests that you could paint a previously assembled/converted model.