Search results for query: oxalic acid

...of the family otherwise I would not touch it!!!) They want it stripped back to the natural colour to make it look more modern. I have stripped the dark Ercol in the past and not found it to be a problem apart from the end grain which requires a lot more sanding and an application of Oxalic acid.

...When there was blotchy wood I would mix strong bleach and water and slap it on with a cloth, If it was oil that had soaked in I used Oxalic acid crystals dissolved in warm water, I soaked a cloth in it and then put it over the stain for a few hours, It usually brought the oil out.. This is...

Oxalic Acid

oxalic acid you would think would do the job . I have used mould and mildew blaster for same type symptoms with good results. spray leave a while , wipe off. dont let it get on your clothing tho its like raw bleach.

Bit late maybe but I'm surprised nobody mentioned oxalic acid in response to your no. 2. Oxalic acid's major claim to fame is the reduction or removal of black staining in woods when they're due to a reaction between iron in water and tannin in the wood. The effect can be like magic in the best...

There are several ways I use to keep interior oak light. Wipe down with Oxalic acid and then neutralise. Then either: Apply no finish at all. You get a vey natural look and I have taken to doing this on a lot of oak internal joinery I make. Exceedingly easy to touch up (oddly enough)...

...I had to paint over it. What I did learn from this though is that the stain does not go through the entire wood. I have so far tried oxalic acid without success. Is there anything else I can do? Replacing the wall would be an issue because behind it is a shower with decorative tiles. Thank...

I've no experience of this at all, but the two standard treatments for mortar stains are "brick acid" and oxalic acid. The latter is more a bleach than an acid, but both should be used with caution, and all the necessary health 'n safety gear.

If you just want it lighter try a clean with Acetone, then Oxalic acid.

We have oxalic acid for mild bleaching or black stain removal, A B bleach is much strong but my favourite bleach is Lakeone but I have not tried it on wenge. https://www.agwoodcare.co.uk/products/l ... dwhitener/ Cheers Peter

"The dose determines the poison." Oxalic is toxic, it can actually kill, but despite this there's no need to panic as small quantities aren't harmful. It's just like with cyanide, where a little doesn't harm you. Literally. That characteristic marzipan flavour when you bite into an apple seed...

I know oxalic acid is used to lighten wood but will it work on this? I have spruce guitar top which I jointed, cut to shape, inlaid a rosette and sanded to near final thickness a couple of years ago. I was then distracted so it was put on a shelf. It was partly covered by a sheet of cardboard...

...old finish off. Some sanding is nearly always necessary and here it seems it's very likely it will be needed (in addition to some use of oxalic acid), but for bulk removal of finish sanding should be the method of last recourse, especially where you don't want to risk going through veneers...

Try some oxalic acid on the stains. Works well on black rings from people leaving glasses on table tops.

I have used holly quite a lot last year, I turned all the pieces green and very thin, coloring can be a problem but Oxalic acid will bleach it white. Holly is a nice wood to turn but bland and as mentioned very prone to staining and checks. If you are a new turner use it to practice on, try some...

...after the rasp and file work. One last thing, if the handle is beech and I want it to end up looking like this I'll reach for the oxalic acid which does wonders for greyed wood and many seemingly intractable black stains. But otherwise a dark stain or brown finish can cover a multitude of...

It is possible to keep oak not looking grey, but it does require maintenance annually or every two years or so. If you are willing to use oxalic acid powder, and a pressure washer, then you can take it back to a natural colour quite easily. Jet washing also works on teak garden furniture...

...an answer yet but as you probably suspected you need to remove the burned wood, it's really the only way. Slight discolouration around a burn might be bleached using oxalic acid but the main scorching and any charring needs to be physically removed. How deep are the burns, how thin in the wood?

I have an old 6" x ^2 post holding a porch, it weathered to a lovely silver and the cracks just added to the appeal. You can clean any marks with oxalic acid wash, I did this then gave a coat of Danish oil, came up a treat. But oak will crack....

...door but not for a tabletop exposed in the garden year round. If you do go ahead and plane and sand this you're unlikely to need to use oxalic acid. On wood much more weathered than this the most superficial planing can remove the greyed surface, just a handful of passes with a smoothing...