Thor Report post Posted March 5, 2015 (edited) Sometimes it can be tricky to get the stuff you need and sometimes you don't get it at all. Later one in my case. The local pharmacist is unable to get it. Therefore I'd like to know if there is any other method of getting rid of them nasty spots on the leather. Would acetone work as well? Just for reference, here are two threads covering the topic with oxalic acid. http://leatherworker.net/forum/index.php?showtopic=25558&hl=%2Bremove+%2Bblack+%2Bspots http://leatherworker.net/forum/index.php?showtopic=21788&hl=%2Bremove+%2Bblack+%2Bspots I've seen the lemon juice idea, but haven't been able to reproduce. Edited March 5, 2015 by Thor Quote Share this post Link to post Share on other sites
TwinOaks Report post Posted March 5, 2015 If you'll double check the last post, Oxalic acid is also used in cleaning agents, and in wood bleach. As you are in Germany, I don't know what the equivalent terms would be. Acetone will probably NOT work, as the spots are caused by a chemical reaction between the metal and the leather. You can spend several hours reading up on this in several of the "vinegaroon" topics. The use of a mild acid to clean the spots most likely results in another chemical reaction - between the acid and the products of the reaction that caused the spots in the first place. Quote Share this post Link to post Share on other sites
camano ridge Report post Posted March 5, 2015 Thor, locate a bee keeping supply place in your area. Oxalic acid is used in controlling the Varro bee. It is available from beekeeping supply places. I looked on line and found several in Germany that carry it. Here is a link to one. http://www.bienen-voigt.de/bienenpflege/saeuren-und-zubehoer/453/oxal-acid Quote Share this post Link to post Share on other sites
Thor Report post Posted March 5, 2015 Thanks camano. Mike you wouldn't believe how many products I went through in the local building supplies. None of them contained it. Sometimes it's really hard to find an equivalent. Wouldn't have thought that it would be found in a bee's keeping supply shop. However, thank for your help. Problem solved. Quote Share this post Link to post Share on other sites
blueblazer Report post Posted April 1, 2015 Ive also successfully removed oxidized black spots with lemon and lime juice, though they were more like light smears. Might be worth a shot trying that out first. Quote Share this post Link to post Share on other sites
