The best way to clean an aluminum briefcase from any spots, spills, or stains is by using a damp wash cloth or paper towel that's soaked in water and Ivory soap.
I would say the key system is the best when it comes to the locking system in the briefcase, since you have an access to the briefcase it is hard to break into.
There are many places where one can purchase a men's briefcase. The best place to purchase a men's briefcase is at a local luggage store or briefcase store.
A smooth, clean surface containing no grease.
If you carry your briefcase while traveling, a wheeled briefcase may be the best option.
The best way to clean garden furniture is with a hose and some dish soap. If it needs scrubbed, you can scrub the soap in before spraying it off. This article will give you 5 easy steps to clean your powdered aluminum furniture - http://www.ehow.com/how_4899759_clean-powder-coated-furniture.html
The best thing to clean the outside of your windscreen is a glass cleaner like Windex. It is designed to remove residue left on the surface and leave a streak free finish.
I would suggest looking at aluminum furniture for a patio bar set. It will stand up best if it is going to be left outside year round. It is also the easiest to keep clean.
Rub with aluminum foil.
To maintain the quality, you would need to clean it regularly with soap and water. Here is a detailed guide on how to clean it: http://www.ehow.com/how_6703044_clean-aluminum-outdoor-furniture.html
The best way to keep a toilet clean is to regularly clean it with a toilet brush and cleaner, wipe down the outside with a disinfectant, and avoid flushing items that can clog the toilet.
Metal cases are the best for impact resistance.
The best way to keep a briefcase from scuffing is to make sure the leather is genuine and authentic. If a bit of scuffing occurs, polish with hide the blemishes and keep it looking new and crisp.