I've got the itch to brew a sour and after lots of research I'm I still have one major concern; contamination. I've read that some people never use anything plastic that comes in contact with a buggy beer on their other beers. I've also read that cleaning plastic equipment with bleach or iodine will wash away those worries. I understand that bugs like to hide in scratches in plastic buckets so I will be using a glass carboy as a fermenter. I am very good about keeping my equipment clean and I have no problem scrubbing things down with a bleach solution if that's all it takes to clean up after a sour beer. I just wanted to make sure I won't have to be in the market for a new siphon, funnel, and other what-have-yous that come in contact with some bugs.
You can definitely clean any stainless or glass that come in contact with the buggy beer. But most, if not all plastics are semi permeable. Keep a separate set of hoses, buckets, etc. for the sour beers.