I was wondering the same thing.. thought about using crystal glo on it (works great on the bikes) more of a polish than a wax...
I did read this:
How To Wash And Clean — Safely
Compared to glossy paint finishes, the surfaces of matte cars need to be washed more often and more gently. The most important step is to avoid creating scratches or swirl marks while washing. That means buying high-quality microfiber towels and soft wash mitts, and washing them thoroughly after each car wash. Any type of automotive-specific liquid car wash soap can be used safely. Owners also should use two buckets — one with soapy suds, one with just water — to avoid contamination. After applying soapy water to the car, dousing the wash mitt in the plain water and wringing it out will prevent some grime from being carried back into the clean, soap-filled bucket.
“We preach the two-bucket method on a gloss finish, but it’s almost mandatory on a matte finish,” Pennington says.
To avoid introducing corrosive and scratching brake dust into the paintwork, owners should also use a separate wash mitt for cleaning the wheels, and should do so with a separate bucket of water.Hyundai, meanwhile, recommends beginning each wash session by pressure-washing the car. The nozzle should be at least 10 inches from the surface of the car. After that, Hyundai suggests using the same two-bucket wash method advocated by Meguiar’s.
Both BMW and Mercedes stress that anything that sticks to the paint surface, like dead bugs, tree sap, or bird droppings, should be removed immediately. Because rubbing aggressively can ruin the matte finish, the companies recommend dousing the item in insect remover or car-wash soap before gently rubbing it away. The key, Pennington says, is to avoid excessive friction when trying to remove anything stuck to the paint surface. Water spots should likewise be cleaned off quickly, even if they result from something as trivial as driving past a garden sprinkler.
As waxes and polishes are verboten, Pennington advises adding some UV protection and shine to matte paint with specially formulated spray waxes. Meguiar’s own Ultimate Quick Wax, for instance, doesn’t have any harsh cleaners that will damage matte paints, and it creates a protective coating over the paint surface.
and the guys at Meguires say:
You can use Ultimate Quik Wax if you spray it onto a microfiber towel rather than directly onto the paint itself. It will keep a nice sheen to the finish but it won't turn matte paint to gloss. You can also use Ultimate Quik Detailer if you prefer. But what works great on matte paint is our new Ultimate Wash & Wax Anywhere. We did some demos at SourceInterlink Publications (publishers of Hot Rod, Car Craft, Motor Trend, MotorCyclist, 4WheelDrive, Truckin' and dozens of other publications) here in Irvine, CA recently and one of the motorcycle magazine editors asked if he could try it on his custom bike, painted flat black. He absolutely loved it - not only did it do a nice job of cleaning the finish (duh!) but it added no gloss, no blotches or streakiness, and the finish looked completely uniform and fresh. Of course it has the added benefit of actually leaving a nice polymer protection behind.
If you try to use a liquid or paste wax they will add some noticeable gloss - obviously NOT to the point of seeing real clear reflections, but still. The biggest issue when trying to use traditional liquid or paste waxes is 100% uniform application - it's just not going to happen and you end up with a pretty blotchy looking finish, which isn't good (obviously). Swissvax makes a wax for matte finishes, if you don't mind spending $265 for 6.5 ounces of product. It is good stuff, but only you can determine if that price point works for you or not.
Read more at http://www.meguiarsonline.com/forum...ou-wax-matte-black-paint&#aw3dxFXBQ2PjDi8u.99