Better Boat Teak Cleaner and Brightener for Wood for Use Before Teak Oil or Teak Sealer for Boats, Indoor Furniture, Shower Stool & Wood Outdoor Furniture Restorer Kit Clean & Bright for Stains

I used this on a really old and badly stained teak desk. It really made a huge difference in the appearance within 3 applications. I'm planning on working on the heavy stains some more but I am happy to recommend this product.

Sanding did a much better job.

I tried this product 3 different times to work on my fairly new teak table purchased early summer but got few results. I was very disappointed.

This 32 ounce bottle of "Teak Clean & Bright" is for use on UNFINISHED woods only. I tried using it on a teak shower seat that I'd made about 5 years ago. The seat is made out of teak and was finished with a spar urethane. It's been subjected to shower water and soap on a daily basis for the past five years. It's been soap & water cleaned fairly regularly but I've never used a specialty cleaner on it. Here's what I found:Pros:1. Large bottle at a what appears to be a reasonable price2. Even on "finished" wood, it did brighten it up somewhat3. A little goes a long way. I doubt that I even used an ounce on the project I worked on.4. Very easy to use, basically wipe on, let sit, scrub a little and rinse.Cons:1. Back of bottle, under "ingredients" is states "For more ingredient information visit" their website (I can't put in an external link or Amazon will reject the review - see photos for website info). I wanted to know the percentage of oxalic acid but there was no further information at the website. Vendor should update or drop the "further info" statement.2. The bottle I received had a small pinhole leak in it (see video). I solved the leak by patching the hole with hot melt glue. It's holding for now but I definitely don't want oxalic acid leaking anywhere. Oxalic acid is a corrosive and although I don't suspect the concentration is all that high, it will damage various items if left in contact.3. Under the "DANGER" section on rear label it states "Avoid contact with eyes and prolonged contact with skin." BS - Avoid ALL, let me repeat that, avoid ALL contact with skin. Just using the product with a scrubber on a small item, I burned both hands, not bad but definitely burned. Like most DIYers I scrape up my hands pretty frequently. I had one small cut on my left hand and a small abrasion on my right hand. Both definitely burned when using the product. Luckily I was outside and had a hose next to me. I rinsed my hands with cold water and then got some latex gloves. Highly recommend using waterproof gloves. On the product information page there's a picture of somebody using canvas type gloves. That would just make the acid stay in contact with your skin longer. Bad idea.Summary: I think this would be a good product if used on discolored wood prior to applying a finish. My test was on a finished item and the product did not penetrate the finish. I don't currently have an unfinished wood that needs refreshing. When using, use caution to include appropriate a gloves and eye protection. I assume the leak in my bottle was just a fluke but it's worth checking just to be safe.

Ok, my bad, I was looking for a wipe on, sit for a while, wipe off product to use on my dining room table. Didn't read the whole label, ordered this. If I took my table outside, or moved it onto a tarp, applied, scrubbed, etc., I am very confident this product would do the job and pretty-up my table top.As it's oxalic acid, I can't just casually wipe this on while it sits in my dining room. Too much potential for catastrophe.So not suitable for my purposes, but I've used oxalic acid preparations (wood bleach) before and this will work on any teak you have as long as it has only been sealed with teak oil and not varnish or urethane.To be fair to the manufacturer and the seller, I took one of my chairs to the basement and did what I had intended to do with the table. I did half of the seat so I could compare and contrast, and only worked as I had intended to: wipe on with paper towel, scrub with paper towel, wipe off, rinse, dry, all with just paper towels.The seat has water droplet stains throughout, hasn't been cleaned up in at least 30 years.Results: definitely much cleaner and brighter, but without the scrubbing with an abrasive pad you can't remove enough surface wood to get under the water stains, which are still there, just lighter.So as long as you can take the pieces to clean up somewhere that's safe to apply AND scrub, this will certainly get the job done.PRO tip, wear nitrile gloves and eye protection.