So I've just popped the the bonnet to fit a new washer bottle cap and noticed hundreds of little white spots on my red samco coolant hoses. I've had a quick look on the net and it appears that it's the coolant causing this, which I guess could be true as where the hoses fit onto solid pipes there's no white spots. The coolant in genuine Nissan pre mixed stuff. Has this happened to anyone else on here ? I've had a look on here and couldn't find anything.