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Oxalic Acid
I am refinishing a canoe paddle and would like to use oxalic acid on the
dark spots. 1. Can I still use the acid I have had for 25 years? 2. What proportion should I mix with water? Many thanks. Dwight Gibb |
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Does this paddle have some special significance in your life? Yes, you
can use the oxalic acid you've had for 25 years. It'll work just fine. But don't thank me, as I don't know the proportion to which you should mix it down. Tom |
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tom wrote:
Does this paddle have some special significance in your life? Yes, you can use the oxalic acid you've had for 25 years. It'll work just fine. But don't thank me, as I don't know the proportion to which you should mix it down. Tom Yes, it is a fine paddle - Clement of Quebec - ash spline and softwood outside. It is amazing how many terrible canoe paddles are in use, and how much better a good one is. I am embarrassed to say that I have refinished it only one or two times. To respond to others - I have used oxalic acid in the past to remove black areas. But perhaps some other products are better. Thanks for the help. |
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Dwight News wrote:
I am refinishing a canoe paddle and would like to use oxalic acid on the dark spots. 1. Can I still use the acid I have had for 25 years? Shouldn't be a problem. 2. What proportion should I mix with water? Usually you just make a saturated solution. Start with hot water, and dissolve as many crystals as you can (stirring until your arms are sore helps). As the water cools, you'll get a bit of precipitate...no big deal. |
#5
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Dwight News wrote:
I am refinishing a canoe paddle and would like to use oxalic acid on the dark spots. 1. Can I still use the acid I have had for 25 years? 2. What proportion should I mix with water? What will dissolve--usual crystals takes somewhere on the order of 10-12 oz/gal hot water... |
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