So my problem is....

I'm confused. Are the streaks from water dripping or from the Motor Kote?

If they are from dripping - do I final rinse with DI water. Then let it dry overnight or in the sun and just wipe it with a QD. A CR Spotless is a great tool here. A lot of times I wash my car and just let it drip dry in the garage overnight. No drying at all. Any "spots", wipe right off with a QD the next day.

If they are from MK - spray it on an applicator and apply it. I dunno. I know a lot of people like this product - but I've never used it. I just use whatever dressing on the engine - but I don't use spray dressings. I use gel and lotion types. Most seem to work well with an applicator. If it's a complex surface - I use Meg's D4510.


This can be smears, or water type streaks that if you try to dry them, they smear. I'm not sure it water is hitting the dressing (but probably not after 3+ months) or water/soap etc that's getting caught under the heat exchanger frame.
 
You need a VX5000 steamer to clean the heat exchanger .
Lay a towel under the exchanger and blast it with steam .
Wait to you see how dirty the towel is.

There's a lot of suntan lotion in the Florida air. Haha
 
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