BlueShift:Dav4122: ...
What are you doing to scratch up the inside of your plastic bottles?
And, where do you source the Grolsch bottles, do you have to buy them full, then empty them?
I had read that cleaning them with the bottle brush or whatever you use can start to put little scratches on the inside of the bottle that make it easier for beer spoiling nasties to attach to - I just use the no rinse sterilizer for longer to try and offset that - but it could be an old brewers tale for all I know
I bought my swing tops from the brew shop in Hamilton and had them couriered up http://www.brewshop.co.nz/brewing-equipment/bottling-equipment




