When you consider that the thickness of the plating on kit pens is measured in "Microns" you can't expect it to last forever . Kit pens by nature are a trade off between Price and Durability . The manufacturers produce kits that people will buy (cheap) , to make higher end kits they add more "bling" to catch the eye , the problem is that the "bling" is plated .
If you really want kits that are more durable then what's available , make them yourself . Brass and Aluminum are very shiny and look really good when polished and they are durable and can be turned on a wood lathe , they do have an "upkeep" issue in that they do oxidize and have to be repolished once and awhile but they don't wear away . In the event that they become scratched , they can be refinished , try doing that with a plated kit .
If you want an even more durable kit , get a metal lathe and work with Stainless steel and Titanium .
Even better , take it to the highest level and learn how to cast Gold and Silver . Now you are talking about pens that will last virtually forever , but you better have really deep pockets .