A tree surgeon just took down a sycamore that had been growing in my neighbour's garden (and probably underneath my house), and I kept a section of it to use to make a front door sign.
My current plan is to create a stencil of the house number, mark it on, and then carve out the number using my Dremel.
My question is: once this is done, what's the best way to finish the wood so that I can keep it outside?
Edit: for context, this will be essentially fully exposed to the elements. The idea is to put it next to my doorstep. I'm not too fussed about the colour from light brown to dark brown, so long as it's recognisable as wood.
Second edit: thanks for all the great comments so far, which are suggesting dealing with the drying problem first. However, assuming that I dry it out, what is the best way to finish it for outside?
Thanks in advance