Its always a good habit to get into to touch up your blades after each day of use. Not only are they easier to sharpen before they are totally blunted but also to oil them to prevent rust. The last week I used the two larger blades in the pictures I ended up in hospital for a series of operations and never got back to them until today, 8 months later. Sharpening my carving knife reminded me to get them out and I have paid the price. They will now require much more work to get an edge back on them and a lot of TLC with steel wool and oil to remove the rust that has started to develop.

the old texta on the edge trick