if a car sitting outside and waxed every week still gets clear coat failure, why even bother waxing at all?
To answer your question...
why even bother waxing it at all?
So your car looks good while you own it and drive it.
To go a little deeper... my opinion, (for what it's worth), is that regular maintenance will help prevent or slow down clearcoat failure. Here's a simple little saying,
"Something is better than nothing"
Maintaining the clearcoat keeps it in good shape so it
can last. Not maintaining it lets it degrade and then its certain to fail faster than if it had been cared for. My lifelong complaint about clearcoat paints is the fact that they DO fail and when they do fail you and I cannot fix them.
This is why I like single stage paint. It does NOT fail. It oxidizes but you and I can fix oxidation. Only a body shop and a painter can fix clearcoat failure.
If clear coat gets hazy, but can be buffed back to a shine, is it pretty much too late to save it? point of no return?
I'm going to be very specific with my words...
If a clearcoat gets hazy but can be buffed back to where it's CLEAR again, (that's different than making the surface
shiny), AND the clarity remains past a week then from experience the clearcoat is still functional. If after buffing the clearcoat becomes clear again but in a few days to a week it returns to a cloudy, opaque appearance then that's the visual sign of beginning clearcoat failure.
See my article and the picture of beginning clearcoat failure here,
Beginning Clearcoat Failure
I have a 2007 dark gray car, and the roof paint has gotten hazy or dull (in the sense that reflections are not very clear). With a DA polisher, I can restore some shine, but does dull paint mean the paint has already failed?
To vague of a description of what you did? More important than telling us what tool you used would be to tell us what pad and product you used.
But if I go by just what you posted and do something I hate to do and that's "assume" then your description PLUS where you live and all the SUNSHINE you get in Los Angeles on all the horizontal surfaces, it sounds like beginning clearcoat failure.
I was hoping that I could maintain the shine by applying layers of paint sealant.
But it sounds like car paint fails regardless of the effort you put in to maintain it.
The idea of "layering" for MORE protection is a great idea but it simply doesn't work in reality. A better approach is to regularly wash and maintain the paint. I have an article on MOL on layering from around the year 2004 that tackled the topic of layering when it hit a crescendo in the online detailing world.
What's the deal with "Layering?"
And then also covered the topic here in 2010
Sacrificial Barrier Coating = The purpose of a wax or synthetic paint sealant
And here's why you don't want to continually use a
non-cleaning wax to try to build up layers of protection on cars that are
daily drivers.
Here's why you need to polish paint...
A few of my local friends have figured the paint game out. When they get a car painted the get it painted with single stage paint. Thus no chance of clearcoat failure. When the single stage paint oxidizes... they simply polish it back to perfection. I demonstrate this unique feature about single stage paint all the time in this thread,
The Secret to Removing Oxidation and Restoring a Show Car Finish to Antique Single Stage Paints
