How do I clean vintage chased aluminum?

Don't use acetone, you will ruin it. Go to Walmart and in their auto department they sell Purple Power, it is a cleaner degreaser that you can use for many things, diluted or not and it is only $5 a gallon. Works great.

Here's some information that might be helpful.

https://www.wikihow.com/Clean-Hammered-Aluminum

I use Dollar Tree Awesome Degreaser and so does our local auto detailer.

A paste made with cream of tartar works wonders on greasy kitchen buildup on all kinds of things like small appliances and range hoods. It's very mild and non-abrasive.

Search the web for a multitude of "recipes", or try this one: https://www.diynetwork.com/how-to/maintenance-and-repair/cleaning/how-to-clean-aluminum

I actually put mine into the dishwasher with regular dishwasher powder and was amazed at how shiny the pieces emerged!

may sound strange but try some WD-40. It may remove it. It does all kinds of sticky stuff. I used it with 000 steel wool to clean the grease from around my cabinet handles. Worked great.

Have you tried toothpaste and a damp cloth or toothbrush. I use it to clean A lot of things I sell on Ebay. I use white toothpaste (not gel) and a damp toothbrush. For large items I use a damp cloth. Also works on silver, copper, brass, gold, porcelain, ceramics, sneakers, plastics, etc. For my sales I needed one product for cleaning everything.

https://www.howtocleanthings.com/how-to-clean-aluminum/

No acetone. Try sudsy ammonia. Store brand is fine. Mix it with a little water, and soak. Ammonia is the original grease cutter. AND very inexpensive.

1. I've had excellent results by making a paste of a small amount of baking soda and juice from a lemon. Just scrub lightly using a soft cloth or your fingers so as not to damage the piece. Then wipe clean with a damp cloth to remove all the mixture, then dry thoroughly with a soft towel.

I understand now what you're looking for. However, in my experience there's a subdued, softer look that is natural to this type of aluminum. Nearly a non-shiny pewter look, so you won't get that with the baking soda paste I recommended. I hope you locate what you want to achieve the bling you want.