I buy most of my parts at AutoZone opting for the parts with a lifetime warranty. I've gotten good service out of most of their parts although I can't remember the last time I had to change out a water pump on anything other than my tractor.
What is the engine temp?
If the hose going to the heater core is cold once the engine has reached operating temps there must be some sort of restriction so I'd start by disconnecting/inspecting it.
If the thermostat was faulty you'd either over heat or the engine would take a long time to reach...
It can be used to remove/tighten the valve core along with depressing it to remove some air.
I have one somewhere, don't think I've ever seen the blue one before.
Does it need to be on the exterior? Mine is mounted to the inside of the windshield in the neighborhood of the mirror. I'd have to go look to see what brand it is - a gift from my son.
Powder coats typically dry to a harder film than regular enamels which is why they normally outlast regular paint - it also makes them harder to prep for repaint.
Powder coat should outlast regular paint. The process involves sandblasting the metal first. Perhaps the prep was lacking on your sliders.
If all the powder coat is scuffed up and any/all rust removed it should paint well although it doesn't hurt to take it down to clean metal. Paint in rattle...
The zippers on my top can be stubborn at times. I always figured it was partly from limited use and my 1/4 mile+ unpaved mountain driveway. What I do occasionally is take some household cleaner and spray the zipper working it up and down.
Terry, I might try that if I can find it at our local...
IMO it's too early but I already seen Halloween stuff for sale in the stores. That said, if it suits you and yours - don't worry about what the rest think.