[brookn]

Hi,
If it is dry and not spreading, (usually turns a light brown color), it would suggest mechanical damage. Such as getting pinched or poked, or possibly rubbed up against something etc...A picture would help if you can get one. The mention of a darker area concerns me. There really are a few possibilities depending on what it looks like. I have successfully cut spots out of some of my plants, and a few of my rescues (phals) had some mechanical damage to the leaves when I got them, I left the leaves as is in that case, because 1. it was not spreading and 2. I did not want to cut on the leaves if possible so as not to introduce infection. Besides being unsightly, it is harmless if that is what it is. I have one with a split leaf and some spots, the leaf is on the bottom. This leaf is finally getting ready to be shed by the plant, which is normal as it is the oldest, and the plant is getting ready to go into new growth (just finished blooming).

If this is something else, depending, when I cut (I use a hobby knife that is used on model cars, bought only for use on the plants), I neatly cut around the spot into the green area of the plant so as to get all of it. I then put cinnamon into my hand and press it lightly onto the cut area making sure it sticks to the cut spot, then I just dust or blow on the leaf to remove the excess. I usually do not use the peroxide for the cut parts of a leaf unless I am suspicious that there is bacterial rot. If I suspect rot, I just pour the peroxide onto the area, let it sit for about five min, then dry it off and put on the cinnamon. Like I said, some more information would help, and a pic would be even better.