We have some outside cupboards with doors made from cedar. In preparation t o re-oiling them my wife found that oxi-bleech (I think that's what it's ca lled) was a good way to clean them and vanish is a good source of it. Anywa y she cleaned them with it and they came up pretty well.
Several of the doors have drip marks left which are presumably where the ra in has been dropping off the top onto the doors directly. These are dark li nes running perpendicular to the grain. After some searching she discovered that it could be that the rainbow bringing the natural resins out of the w ood.
Anyone know whether this is indeed the case and what the best way of removi ng them is. I am loathed to sand them all again unless I have to.