If you could make any metallic object see through, what would be the quickest way to earn money which does not violate anyone?

(This has some grounds in reallity, so this very well is a post for brain storming). By not violating, i mean no creeping on others in their privatee places. Consider your selves owners of a factory which produces metallic objects which are transparent (properties similar to aluminium) what could be a product which could get you huge profits.

I would also like you to ignore the easiest option to make displays (for phones, laptops etc) which are much more tensile and durable.

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Transparent metallic containers would be a revolution - cooking pots, gas cylinders, even electronics. We could even have transparent wires (transparent insulation is already a thing).
- OP is probably asking, because transparent aluminum already exists, yet isn't used widely
  
  The name is misleading because transparent aluminium is actually a ceramic, not a metal, so its properties are nothing like you'd expect from a metal - it has low thermal and electrical conductivities, it's more likely to fracture than to bend, etc.
  
  not really, but there are some methods to grow materials a bit more generally that they are transparent to some wavelengths. It is not new, or anything, and is used in other structured materials.

Obvious answer is probably safety glass. If it outperformed current bullet resistant glass, it could make some people safer. Structural glass would also be good, so you could have better storm windows, greenhouses, etc. It also would be useful for making inspection easier in some cases. Pressurized vessels could have more visibility or more structural strength. Aquariums could be less bulky.
- Aquariums would not get less bulky, but we would not have catastrophic failure
  
  Depends. If the metal is stronger than the glass it could be thinner, which is not that big of a deal in home aquariums, but aquariums, in the sense of a place one goes to look at fish, have huge, thick walls of glass to hold back the millions of gallons of water. If you could get that same strength with thinner material you could have a smaller footprint/more viewer space or a bigger tank with less reinforcement.

Whatever transparent aluminum is already used for. I mean... It already exists in reality. 🤷🏻‍♂️
- it is not metalliic though (it is a ceramic, and hence does not undergo plastic deformation, arguably most important mechanical properties of aluminum)

Sell it to airplane manufacturers so they can make fuselages without needing holes for windows.
- ii thought it was a great answer, and it is, but soem planes alrady have thick polymeric glasses, and metal ones won't be much of an improvement then
  
  You still need to put a hole into the fusalage to fit the window, which decreases structural integrity of the airframe (the reason why plane windows are rounded and not square). The ability to have a solid-piece fusalage that can just be made see-through where needed would be big improvment.

I'll ignore "quickest way to earn money" and answer "great applications" (IMO):
indestructible, bendable solar cells
airplanes without windows, drastically lowering fuselage weight and fuel consumption
no more blind spots in cars and trucks
- “quickest way to earn money” is mostly to say - has commercial applications, which can get you research funding
  solar panels still may not be transparent, silicon still has to be crystalline, and not bendy.
  you would not want the wole fuselage be made of soemthing transparent, that would be way to much light. I also answerd indowws in some other reply
  Similar answer for cars, though it could be coupled with some electrochromic materials, and have a transparent roof top, which can be used to make huge sun/moon roofs, wand still have weathr protection.
  
  No, the solar panels won't be transparent, but their top will be metal instead of glass.
  And the whole fuselage won't be transparent, but you can make transparent sides instead of cutting holes for windows.
  For cars, I guess it depends on the properties of the material and if they can serve as crumple zones.

More durable teapots? See through thermos bottle? See through radiators? See through bathroom sink or tub?
- the last one does not seem useful (unless you record videos, upload them on ceertain hub)

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