Boil the solution on medium high heat for 15 minutes. Then, remove the solution and let the item cool. You can follow up by scrubbing the item, if necessary. Scrubbing any residue will be much easier thanks to the acidity in the cream of tartar. The cream of tartar can also help to remove any dark or blackened spots on the pan. [2] X Research source
Soaking a pan or small furniture items in cream of tartar and water before scrubbing them can make it easier to remove any residue. You can try to scrub cast aluminum furniture with a soft toothbrush or a fine scrub pad without soaking it first. One option is to run the garden hose over the furniture to give it a good clean and then scrub it with a fine pad or a toothbrush. Avoid using any metal utensils or steel wool on cast aluminum items. These harsh scrubbing tools can damage the finish. [4] X Research source
You can also try another natural acidic product like apple cider vinegar, but make sure you dilute the vinegar with water before soaking the cast aluminum in it or before applying it as a scrub to the furniture.
Apply the dissolver spray on the item and let it sit for 30 minutes. It should help to loosen any residue or crud on the item. You can then use a non-abrasive pad or a soft-bristled brush on the item.
With this option, it is important that you remove any non-aluminum parts on the item as they can be damaged in the oven. Remove any steel or wood parts, such as handles and screws. If you cannot remove any non-aluminum parts on the item without damaging it, this option may not be a good one.
You may also want to cover the furniture with covers made of breathable material to protect the furniture when it is not in use or stored away.
If your cast aluminum pot has a warped bottom, for example, you can place the pot upside down on a towel that is laid out on a flat, sturdy surface. Place a wood block or scrap piece of wood over the middle of the warp, such as a 2x4" or a 1x4" block. A soft wood like pine works best, as it will not further warp the aluminum. Make small measured taps over the wood block with the hammer, working slowly and carefully to flatten out the warp. Avoid making any sharp, hard blows on the wood as this can lead to further warping of the aluminum.
