Musk's $80,000 Tesla Cybertrucks are showing signs of RUST after only two DAYS in the rain, according to a driver.

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While Tesla CEO Elon Musk has touted the electric vehicle (EV) Cybertruck’s stainless steel exterior as being bulletproof, new owners have discovered that the vehicle’s exterior may not be as weatherproof as Musk claims.

Some customers who recently bought the $79.900 Cybertruck have reported rust on the exterior shell after driving the vehicle in the rain for two days.

One Cybertruck owner, Will, wrote on a forum about his experience. “I bought my Cybertruck on February 1,” he wrote, “and 11 days later, I noticed corrosion on the metal.”

He added that he had put 381 miles of the vehicle on it. I brought it to the dealership, but they told me they didn't have the necessary tools to repair it. They mentioned it would take around a month for them to acquire the tools.

Will also shared photos of his Cybertruck online, showing small stains on the exterior. “It stayed on even after I washed it,” Will wrote. Musk said last year that he would soon offer owners the option to purchase a “Tungsten Carbide coating, but at an additional cost.”

This Cybertruck is 381 miles old and has been in my custody for 11 days parked outside of my home. After cold weather, rain and direct sunlight, I attached some photos of corrosion spots along with a video. The spots seem to be more visible on the upper metal that rises over the truck bed, but they are all over the top of the metal.

Will said the issues started after driving in rain. Another owner on the forum said the same thing after a short period of exposure to the condensation.

Raxar said they picked up their car on the 1st of February and got a call from an advisor saying the car was developing orange rust spots in the rain that needed buffing out.

"I know I've heard the saying 'never take your Delorean out in the rain,' but I've never read about rust and cybertrucks," Raxar said.

Someone commented that if it 'rocks', it's definitely not stainless steel.

Stainless steel is resistant to rust, but it is not impervious to corrosion. Mead Metals says that stainless steel will rust from exposure to corrosive chemicals, salt, grease or long periods of exposure to heat. However, according to the owners who posted images of corroded cybertrucks, they had only been in use for a couple of days. 

The easiest way for stainless steel to rust is if a piece of regular steel is rubbed on the surface of a stainless steel piece that is resistant to corrosion, according to a Sperk Engineering Services report. The iron from the regular steel then rubs off onto the surface of the stainless steel like a film, and after a few days in the atmosphere, the unalloy steel film forms an ugly rust. 

Stainless steel should not corrode in normal rain. 

Some people have speculated online about what might be causing the discolored cybertruck paint. One user posted on the forum that it could be rust specks from the environment, or it could be the rail dust that happened during shipping.

Little metal fragments are launched into the air and drop on the horizontal surfaces of the cars when automobiles are transported by train from the plant. The train cars' metal wheels are moving on metal rails.

The user, Daryoon, said that after using a clay bar on their Cybertruck, the iron flecks were eliminated and that "all rust traces [were] gone."

"I used car polish to clean up some of the other spots I found, but it didn't remove the warm hue that is the stainless steel's patina," they posted.

Others said that since the specks are black and iron oxide is reddish brown, they cannot have rusted.