As for the tools the Skil is a brand I recognize, but the Hardin is not. When I googled it I only see sites that are set up by the person selling this item. It doesn't really "exist" anywhere else. I cannot speak for that tool except to say that perhaps it will work for you. There is not a single wet polisher I know of that sells to dealers for less than $200, so caveat emptor.
When you polish Silestone you need pads that are designed for use on Engineered Stone, which the pads that come with the polisher you mention look like the run of the mill Chinese low quality stuff. Good luck with that.
By the way, if you look at your slabs closely you will notice that there is a "snakeskin" texture on it that your polishing pads will not duplicate. In order to do that you will need to use something designed to replicate the textured finish on all ES. We recommend the Klone-It kits which you can see here:
http://www.defusco.com/Klone-It-Compounds-and-Buffing-Wheels-onlyFor laminating ES you can use epoxy or a good quality polyester resin. You can only use poly if it is an indoor application. Look at these pages:
http://www.defusco.com/Epoxy-For-Natural-Stonehttp://www.defusco.com/Polyester-ResinsOther items you may be needing are:
blades
http://www.defusco.com/Dry-Cutting-Turbo-Rim-Bladescore bits
http://www.defusco.com/Premium-Stone-Core-Bitsrouter bits for your grinder
http://www.defusco.com/Diamond-Router-Bits-For-Grinders Polishing pads designed for engineered stone
http://www.defusco.com/4-Inch-Gamma-Wet-Pads-For-Engineered-Stonehttp://www.defusco.com/Weha-ES-Engineered-Stone-Polishing-PadsYou may want to see this:
http://www.tilesawdepot.com/How-To-Videos/Fabricating-Stone-DVDs-All-3-DVDsGlad to be of service,
Mark
