Topgun Case Breaks ?

[texski]

jodama,
What a tremendous example you show. It takes real character to admit a mistake publicly. We all have something to learn and something to share.

I think lasher's movement needs help, not his case.

Please tell me more about the 'clammy burnish.' Someone asked me how to remove scuff marks, and I gave him some suggestions. But it sounds like you have a proven method.

Thanks,
Mike

OK Thanks Guys, I checked it again and you are right.
I could even remove some marks with a clammy burnish.

This watch amazes me even more.

Thank You and sorry for my mistake.

@ lasher could you post a picture of your broken case, I think it would be quite interesting.

 

[Spiralkladd]

Yes, i am also interested to know how to remove those scuff marks from a ceramic case (iwc top gun).

 

[trailboss99]

I'm interested to know how the hell you guys get marks on a ceramic case! the stuff is almost unmarkable.

 

[AstroAvia]

Not all ceramics are the same, guys. Take brick and sapphire as examples. They both are ceramics in the technical sense of the term, yet they have very different (physical and chemical) properties.

When scratching a surface, hardness is the mechanical property at play. The hardest material scracthes any other material of lower hardness. In the context of this thread, ceramics in general are materials of very high hardness, but each specific ceramic substance has its characteristic hardness, which depends on several variables.

We all know that diamond is one of the hardest natural substances on earth; it is also a ceramic substance and it will scratch almost any other material. It will scratch sapphire, whereas brick won't scratch sapphire. Diamond will also scratch steel (whatever steel), which in turn scratches brick, but doesn't scratch sapphire (unless excessive pressure is applied), and so on...

The problem is that the higher the hardness, the more brittle a material tends to be. When subjected to impact loads, brittleness (or toughness, to be more precise) is the property at play. Thus, the hard ceramic case of the Top Gun, even though very scratch resistant (not unscratchable, mind you) can not withstand high impacts or it will shatter. Just like your china plates in the kitchen...