... a good tool but the blade has a chip in it. can anybody reccomend anybody to repair this and give me some sharpening advice please?
HI Tim, and welcome to the forum.
Which knife is it?
http://www.roselli.fi/1/index-eng.html
My advice is be patient and cautious. You don't want to find that you've done more damage trying to repair it than you had to begin with, especially if the damage is little more than cosmetic. Some blades even have a notch deliberately ground into them for particular jobs like wire stripping, so maybe you could make a feature of it! There are some very skilled people reading, and they will have good advice to offer, but it will help everybody if you can show photographs of the knife and the damaged area. Whatever you do don't try anything like welding on a knife blade or you'd probably destroy it, and careless grinding with a power tool can overheat the metal with serious consequences too. Generally, do the minimum that you can to keep the tool in working order.
I have a few tools that I use for odd jobs and gardening that have had some pretty horrendous chunks taken out of them over the years, and my dog ate most of the handle off my favourite macheti. He was my favourite dog, and he's long dead, so I still haven't repaired the handle -- just wrapped it in tape for the memory of him. By and large the tools all still function perfectly fine. I know that nobody will bother stealing them, or if they do they'd better not let me see them because I'll recognize them instantly.
As for sharpening, again be cautious. There are some threads in the forum that you can read to start you off, come back with specific questions once you've done that. It isn't rocket science but there's more to it than meets the eye and it can take practice and patience. Some of the modern steels designed for high wear resistance can be tough to sharpen, but I don't think you'll have any problems with high-carbon steel which is what your knife is probably made of. As you now know it can be brittle, but if you treat it right that isn't an issue and it should last you the rest of your life. The main problem is that soon you'll probably want a load more different ones...