Please feel free to contest me on this,
But I think that it would not make much of a difference on your brake's ability to stop after they are heated up. Assuming there is some WD-40 left over, then breaks still work on two properties. Abrasive and adhesive energy transfer. At higher pressures, temps, the pad and disc actually begin to literally fuse atomically, thus completely wavering the ability of any lubricant to create a more slippery environment. However, lubricants will cause potential impurities in this semi-pad, semi-disc fusion material, making it weaker. But I just wanted to throw that out there, its not just that oils are lubricants. And its not just energy transfer by friction or abrasive energy transfer.
But I think that it would not make much of a difference on your brake's ability to stop after they are heated up. Assuming there is some WD-40 left over, then breaks still work on two properties. Abrasive and adhesive energy transfer. At higher pressures, temps, the pad and disc actually begin to literally fuse atomically, thus completely wavering the ability of any lubricant to create a more slippery environment. However, lubricants will cause potential impurities in this semi-pad, semi-disc fusion material, making it weaker. But I just wanted to throw that out there, its not just that oils are lubricants. And its not just energy transfer by friction or abrasive energy transfer.