They wanted lots of money to strip the paintwork right back, respray it and then re lacquer it. Figure 3: Bubbling on the backside of a polyurethane paint film. That will be a line I will use should they not offer me a full warranty repair. I can see a few other tiny tiny spots of blisters on other parts of the car aswell now. Consequently, if the next coating layer is applied too soon, the solvent in the underlying film becomes trapped and bubble formation can occur. Ridiculous fashion. First off there was only a few small patches which I could live with, but now there are more places on the car getting worse. on a car 2 years old costing over £40,000 ! This article was co-authored by Angel Ricardo. The gas is typically trapped in the lower layers of the urethane coating film and also at the interface of any previously applied coating where the moisture was present. On 10/1/2019 at 7:56 PM, royoftherovers said: problems with blistering lacquer on wheels nx. cobblers line ",it surely can't be a manufacturers fault". Diamond cut alloys are not fit for purpose as all manufacturers suffer the same issue. On the other hand, understanding why blisters form as a result of coatings application on surfaces with elevated temperatures or on porous substrates (such as concrete) is much simpler. Skip this step if the paint is already scuffed up from your earlier sanding. :beerchug: Hi guys, I have a 2002 A4 TDI amulet red and the same is happening, serious peeling happening on the bonnet, and a couple of small spots on the roof, apparently where stones have hit but not really chipped the paint.

Has anyone tried there main dealer ? Two years later the same was happening but this time they said they couldn't source new wheels but would refurbish them. While retained or trapped solvents can often be detected by the telltale solvent smell of liquid taken from blisters (blisters are often liquid-filled), their presence is verified by using laboratory analytical methods for the solvent detection such as gas chromatography/mass spectroscopy (GCMS). THe paint lacquer on my 2002 A4 Avant is blistering and coming off in places. This occurs because the isocyanate component of the urethane formulation reacts with moisture.     Those “blue sky” days must be productive. INSIST THAT IT IS TREATED UNDER THE 3 YEARS MANUFACTURERS WARRANTY AND TELL US THE NAME OF THE LEXUS DEALERSHIP THAT TOLD YOU TO GO AWAY ! Just about everyone who's had diamond cut wheels on any car ever. And by the way I hear what you say about carwashes but I never use a car wash I always clean my car by hand  because  in the past I’ve had  my car is scratched  by them . % of people told us that this article helped them. Powered by Invision Community, Home As a result, any condition (i.e., sunlight) that causes the air to warm and the moisture to vaporize causes expansion and increased pressure within the concrete. There are some well-known mechanisms or driving forces that fuel osmotic blister formation. Forum Activity Your problem seems to be with prestige wheels! Cause of the defect. * Spray lighter coats.-----BUBBLING: Surface looks as if the lacquer boiled and remained grainy. Most wheels that have come out on a Lexus from 2013 onwards providing they are not diamond cut or a special finish have been very durable. Your email address will not be published. Scanning acoustic microscopy was used to image blistering of samples from food cans, internally coated with an epoxy-modified polyester lacquer, during exposure to aerated brine. Abrasives Testing: Which Tests Should You Run?

I see ,then armed with that info it might be worth a trip to Audi but don't hold your breath. I've been researching this coating for several months, and I came your article after hours. I THINK THAT YOU HAVE BEEN TOLD A LOAD OF COBBLERS. In summary, blistering and bubbling are common coating problems that occur for several different reasons. Next, spray an aerosol can of clear coat onto the surface. James D. Machen is a senior coatings consultant with KTATator, Inc., a coatings consulting engineering firm and distributor of inspection instruments, where he has been employed for over 20 years. Wait several hours, or overnight, before finishing off the repair. For this reason, this phenomenon is typically referred to as “foaming.” In the case of bubbles with MCU and aliphatic urethane formulations, the outgassing that occurs between layers can disrupt adhesion. In many locations, the coating application season is limited to a time when environmental conditions are favorable (i.e., typically in late spring, summer and early fall). You can only get them refurbished a couple of times at best so the best thing to do would be to get them powder coated or sprayed. A sealing process with pressure and heat or ultrasound is used to connect these two elements. Frequently in the coating industry, the terms “blistering” and “bubbling” are used synonymously. I have a 2002 A4 in red, bonnet & roof are peeling badly.Will have to sand off all laquer & Re-base & laquer.It is all original paint so must be down to manufacture error. Auto Technician. drying too quickly due to too high temperature or wind speed.
If you buy the individual components yourself you’ll need primer, pigment, and clear coat sprays; sandpapers of varying grits (often ranging between 200 and 2000 grit); alcohol and solvent based cleaners; and tack cloths to remove dust and debris. I have some rust coming through on the o/s front arch. Despite this, these terms will … One difference with this formation process is that the bubbles can be very fine and are not always visible to the unaided eye. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. The osmotic forces accelerate the transport of water through the coating in an attempt to equalize pressures (reach equilibrium) on each side of the coating film.

Vin, it sounds like your car is sufferring, is it possible she has been pooly repaired in the past? TerraWet® blister coatings are highly specialized products that proved to be leading in the market. I used this brand lacquer before and never had a problem. ron1953, October 1, 2019 in Lexus CT 200h Club, Has anyone had problems with the lacquer on their diamond cut wheels blistering, I have a 2017 nx 300h f sport just over 2 years old and the lacquer on the wheels is starting to, the dealer  told me he had spoke to the lexus warranties and they said they had know other.
Bubbles in the pores. So now awaiting Audi to confirm and away we go. I suspect your rusty front arches have been caused by the same issue that affects mk4 VW Golfs ie. To properly rectify the paint defects the panels will need to be re- basecoated and lacquered , not good i know and wont be cheap either for a professional job as your audi deserves. By using our site, you agree to our. Performance Testing of Exterior Wood Coatings. [1] It is the vapor pressure that causes bubbles to form. Clear editor. Or, you can try to match the color by bringing a sample — for instance, the door that covers your gas cap — to a store that carries automotive paints. Wear eye protection that will keep out dust and fumes as well. Have read a few other forums and it looks like it's a particular feature of this paint colour.     The dealer is STEVENEAGELL @ RAYLEIGH WEIR ESSEX, WILL GO BACK TO THE DEALER FIRST THING TOMORROW.

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