What causes streaking?

00GREENMACHINE

New member
I washed my car today and then put some nxt on it becuase I wanted to see how it performed before I do a co workers jeep next week. I noticed on the trunk and hood there were darker spots in lines? I guess its streaking? I did not want to press hard on it to see if it would come off. Its like a shadow. I used a foam applicator and it got moist where there was still some water drops. I thought I put it on pretty thin.
 
There are some sealants (like NXT) that may not react well with water. I'm not sure that's your issue... but it could be.

There are other things that can cause streaking...

Incompatible products
Not shaking the product properly (if required)
Bad batch of product (it happens)
Dirty or improper cleaned towels... (fabric softener, bleach in the towels)
Applying a product to heavy
Not allow product to dry before removing (often associated with applying too heavy)

There are others.

You did the right thing by not dry to dry buff the stuff out. I would clean the paint and apply and remove another coat of NXT in the proper manner and see if that cures it.

HTH
 
mine is probably
Applying a product to heavy

but I dont understand how you cant apply it heavy. If I just put a pea size amt on the pad it only covers a very small area and the coverage is not good. Any suggestions? I dont have this problem with the PC and I load the pad each panel.

Oh, and its happen last time on my expedition and this time on my passat. I dont think I had this problem with VM. But I was looking for something that would make the swirls marks etc look better. I also put a coat of EX-P and left it up there for about 1 hour. I did not see any of these marks.
 
GreenMachine,

Based on your response, there is no question in my mind that you are applying the product to heavy, as I've never had a problem with NXT streaking. I've got to hit the "hay" right now for an early day tomorrow. I'm sure somebody will stop by with some help. I'll check in tomorrow with some additional suggestions to help you out.
 
GreenMachine:

Couple of hints and tips on applying uniform, thin layers of products properly:

This applies to hand application and using a PC. (The rotary is another conversation altogether)

First, remember that you are trying to do just that… "apply" a thin "uniform" layer of product. In the case of a paint cleaner, polish, or swirl remover, you are trying to "work" a thin "uniform" layer of product. The word "uniform" is just as important as thin. Think about it… when you apply the product to an applicator or PC pad and just place it on the surface and start working/applying it… the "concentration" of the product is the first part of the application. By the time you work/apply the product to a small area, the last part of that area is receiving "less" product. When that happens, most people will… get more product and apply it to part of the area "again"!

So, with a hand applicator, try this:

Apply several small drops of product to the applicator or apply a small bead of product to the app in a "swirl" fashion from the outside edge of the applicator to the center of the app.

Then, spread the product around on the app with your finger so that it covers the surface or take the app in your hand and fold it together like a clam shell. You have now "primed" the pad.

Now, take the pad and lightly make a horizontal line and a vertical line over… say a 2' by 2' area. It should look like this "+". This starts distributing the "bulk" of the product over the area you are going to apply/work.

Then, working in a clockwise (or counter-clockwise) direction, start "pulling" some of the product from the line of product that you laid down into the area with no product.

Continue until you have completed the square or rectangle or whatever. Try to avoid adding more product before you complete the area. If it seems that you do not to have enough product to complete the section, try working a smaller "+" area the next time, or apply a tad more product.

Once you get the knack for this, you'll see exactly what I'm talking about and you will modify this process to suit your own taste. If after a day or two you see "smearing or streaking in the shape of a "+", you know you've started the process with too much product or haven't "pulled" enough of the product from those lines into the areas with no product. At least, now you will KNOW what your issue is and you can adjust for it.

With the PC, try this:

As with the hand applicator, apply several large drops or use the "swirlie bead" method.

Then, place the PC on the paint (without turning it on) and lightly spread the product over the approximate area you intend to work/apply. (you are also "priming" the pad)

Next, turn the PC on to a slow speed (say 3) and distribute the product over that area even more.

Now, turn the PC up to the speed you want to "work" the product, or contine at 3 to 3.5 to apply your wax or sealant.

This is particularly important when using an abrasive polish. If you simply apply the polish to the pad and place it on the paint and start polishing, you are working more polish and abrasives where you "start" and less product where you "finish" on that area. This is one of the reasons why people have a hard time judging when a product is properly "worked" or they end up with "spotty" results when trying to remove swirls, as more of the product is "concentrated" where they started. While not as important with a wax or sealant, the results can be similar.

Hope this helps.
 
Whenever you notice streaking on the top surfaces of a car such as you mentioned, it's an indication that the paint on those panels have lost some of their natural oils and needs to be replaced. The hood is especially susceptible to loss of oils due to the sun beating down on the surface plus the tremendous amount of heat rising from the engine from underneath so it takes twice the amount of punishment that the other panels get. If the car sits outside, the rain is also driving out the oils (again, mostly on the top surfaces). I would suggest using a product that replenishes the lost oils such as one of the Meguiar's polishes (#7, #9, DACP, etc.). When you are sure that you have replenished the oils and the paint looks healthy again, reapply your wax or sealant and you shouldn't experience any more streaking problems.
 
I've definitely experienced this, with too much product or inadequate shaking generally being the culprits. It's a pain to address, but you sure do learn quickly.

Great advice on the oils - I had this problem with my wife's old Camry. It was one of those "what could I have possibly done wrong" situations, but a coat of Four Star UPC and Adam's Revive polish yielded great results.

Take care,
Jerry
 
thanks guys. I am real impaintent when coming to stuff like this. I guess I need to take some time and not rush. Its hard for me to do that.
 
00GREENMACHINE said:
I guess I need to take some time and not rush. Its hard for me to do that.

That is very good advice you just gave yourself. I used detailing to help me learn a little patience in other aspects of life. :) Take your time, and don't rush yourself. That's an ingredient in the mix that is often times more important than the products you decide to use and often times overlooked.
 
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