MDRX8: Get the concentrate. Apply like Optiseal or OCW. Spreading it around the panel quickly is key, as it apparently bonds very quickly. Give it a final buff and that's it! The 3 week shelf life mixed is from Permanon, oddly, Gtechniq gives no such caveat. Luckily, I've never mixed more than I need for an application. Permanon has a cool dual bottle sprayer which self mixes a 5% solution with distilled H2O. I've just received it and used it once. Otherwise, mix 1 part concentrate to 19 parts dist. H2O into a sprayer. You can use it straight if you like, but I've honestly not seen any difference straight v. 5%, so it seems like kind of a waste. ebpcivicsi: My customers are not what you would call an affluent clientele. A 2-step polish is a big upgrade for them. These are daily drivers, so they get 476, 1000p or a new favorite, 3M Performance Finish. Autobalm if they're swirled and they won't spring for a polish. So, the silicium is reserved for my 3 vehicles. White, silver and black. Looks equally good on all 3. By the way, if 5 months of real durability is a must, give that 3M product a try, though, to be honest, I've never seen an LSP that didn't look like crap after 5 months on a daily driver. Ever.