To paint or not to paint?

Hi, for those with experience/knowledge with kitchen renovation:

1. When we removed the spalshback tiles, we made few dints on the wall/gyprock; now hubby has refilled.
2. will we have problem with sticking the tile adeshive (for the new splashback) directly to the gyprock?
3. If we paint the gyprock, will we have the same problem (#2?).
3. Can anyone recommend fire resistant paint for behind the oven, thanks.
MKP
 
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