Are these expensive (over $150) or relatively cheap knives? For the average knife, there are lots of options. I used worksharp on knives that are absolute garbage. The grind is uneven, but it leaves a very sharp edge with minimal skills. You can easily destroy an expensive knife with this tool. This tool is great for very low carbon steel knives like Dexters or even Forschners. There is no point in getting these types of knives professionally sharpened because they will dull very fast. You know its a low carbon steel knife if its cheap (less than $50-70) and if it tends to rust.
For expensive knives, I use several whetstones. The King 1000/6000 is a good beginner whetstone for around $39. Its a decent stone, but you need to soak it for 5-10 minutes before use. If you need to do very deep re-grind to get rid of chips or dings, you can get an Atoma 140 diamond plate. They will take metal away like you won't believe. I wouldn't use it on expensive knives until you know what you are doing.
Its more rewarding to learn how to sharpen your own knives. For the more expensive knives, you can send those to be professionally sharpened if you worry about damaging them. I wouldn't send it to a butcher shop because they will sharpen it, but they can also damage it.
Just search for "knife sharpening" on Google and there are lots of places in the San Diego area.
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