Best “economy” clear?
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So, I talked to my jobber (we get PPG though keystone) and explained what I was looking for clear wise for side projects. He gave me a gallon kit of Keystone Key Kombo clear (KEY725) to demo. It’s a 4:1 (2.1 VOC) clear, it has a Spot/Panel hardener, and Overall hardener, he gave me one of each. Has anyone used this? It replaced the older Key Kombo (Key724) clear. The only difference I noticed between the new and old versions TDS is solids content (Old was 45% by weight, sprayable, new is only 34%) and the air dry times to polish are slower (was 4-6 hours @ 70f, now its 10-12) The dust free time is 10-15 for the old and new version.
I guess the whole point of this long post is to ask if anyone has sprayed it before? He said it’s high solids, but 33% seems low for a HS clear. The TDS says its a 2 coat clear, 1.0mil per coat, but that seems like low build. It is collision work, but does anyone think 2.0mil total film build is enough, I was thinking I should prob do 3 coats? I’m used to spraying stuff thats about 40% solids or higher, and usually builds 1.5-2mil per coat. I don’t plan on cutting and polishing except for nibs, will 2 mills be enough? I don’t mind doing a third coat, but if 2 is enough id rather not just to save material. The whole kit is only 105 bucks, pretty cheap for 5 sprayable quarts.
Any opinions would be appreciated, I’m not used to using cheaper clears, I wanna get the best results I can.
Couple things,
33% is not close to a HS clear
2.0 miles may or may not be a problem. It depends on the chemistry of the clear but with the lower solids and the lack of UV protection an off brand clear will have 2.0 mils may not be adequate protection.
Most of the clears you listed in the beginning of the post I would be reluctant to say you are getting 1.5 to 2 mils per coat. The 4000 is pretty thin and most likely won’t be there.
When using an aftermarket clear a third coat is never a bad idea for proper UV protection.
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