But see, here's why your question is above my paygrade (which is none). I wish someone else had chimed in, but nobody has. Here's my difficulty, and why I think anyone would have difficulty -- you're trying to supplement a large dose of potassium when it's plentiful in a range of very healthful foods.
Tinting of front windshield glass to reduce light transmission is not permitted, except for the upper 6 inches of the windshield. For side windows or rear windshield, glass tinting that reduces light transmission to less than 32% or increases light reflectance to more than 20% is not permitted. For SUVs, vans and trucks, the limit is 32% for the driverâs window and the front passenger window only.
For this reason, it makes sense to invest a little bit more money into a mid-grade or high-grade window tint installed by a professional. The cost to tint all of a car's windows can range in price from $120 for a small car up to $380 for large vans. Editor's note: This is an updated version of an article that originally posted on Nov. 11, 2012.