Paint Bubble After Rain

**samcoy** · August 11th, 2012 11:55 PM

Guys ano puede gawin para mawala paint bubbles sa trunk? It started appearing when I left the car wet overnight after driving through the rain. Before, small dots lang ang size tapos nawawala after a day of no rain. This week it's like pimples na ang size kasi it rained everyday as you know so it's left wet for almost week. Was curious so I pinched some bubbles and tubig ang laman sa loob. Sa ngayon di pa sya nawawala. Ano puede gawin para maalis and how to prevent it from happening in the future?

**aki0125** · August 12th, 2012 12:33 AM

The trunk of your vehicle has been repainted before. The foundation of the refinishing paint applied to your trunk is not good enough. The bubbles you see are mainly air pockets which in due time water had set into it. Im sorry to inform you sir that you have no other recourse but to have it repainted again. They need to sand down your present paint up to the metal if possible to avoid the re occurance of the said bubbles.

**samcoy** · August 12th, 2012 05:09 PM

Waah! May way ba to slow down the corrosion process? My plan is to have the whole car repainted after the rainy season. I believe it's wrong timing kung magpa-repaint in this season.

**rna800** · August 12th, 2012 05:38 PM

Originally Posted by samcoy

Waah! May way ba to slow down the corrosion process? My plan is to have the whole car repainted after the rainy season. I believe it's wrong timing kung magpa-repaint in this season.

The only way that I know to slow down the corrosion process is to protect the paint. So start from washing your car properly and apply protection like wax, sealant, etc. If possible, put it under a roof. There is nothing you could do with those bubbles anymore unless you have it repainted.

**raul tuason** · August 12th, 2012 05:42 PM

The rainy day "bubble" myth

Car owners are hesitant to have their cars painted when its raining for fear of the dreaded "Bubbles" or "Blisters". This is not true. Generally, the weather has nothing to do with the bubbles or blisters on the car's paint but is always blamed for it. More often, the root cause of blisters is solvent popping caused by the paint sprayer who did not observe the correct flash-off time during the paint spraying stage. Flash-off simply means the allowance of time as specified by the paint manufacturer for the solvent or thinner to evaporate during the paint spraying stage.

In the painting process, a car is sprayed over with basecoat (color) and clearcoat (topcoat) a number of times. If the sprayer fails to observe the flash-off time in between coats, trapped solvents under the succeeding coats will find a way out creating microscopic bubbles.

These tiny holes become very evident during the rainy season when moisture enters the holes and manifests as blisters only to disappear when the sun shines and the moisture evaporates. The long-term effect of blistering is more damaging - as a result paint chipping and lifting will take place.

Cars refinished with Acrylic Lacquer (1K) are more susceptible to blistering. These type of paints have very low film build per coat (low opacity) , the sprayer has to do twice as much sprayovers thereby increasing the probability of failure to observe flash-off times.

In essence, paints are viscous; solvents and thinners are only vehicles for pain to be sprayed on a substrate or surface and should completely evaporate first during the drying process.

**motoring guy** · August 13th, 2012 10:35 AM

In the meantime while you are waiting for the repainting......pierce all the bubbles and sand them to smooth-en the surface and temporarily apply the now famous carbon fiber sticker.

**samcoy** · August 13th, 2012 01:52 PM

Originally Posted by raul tuason

The rainy day "bubble" myth

Car owners are hesitant to have their cars painted when its raining for fear of the dreaded "Bubbles" or "Blisters". This is not true. Generally, the weather has nothing to do with the bubbles or blisters on the car's paint but is always blamed for it. More often, the root cause of blisters is solvent popping caused by the paint sprayer who did not observe the correct flash-off time during the paint spraying stage. Flash-off simply means the allowance of time as specified by the paint manufacturer for the solvent or thinner to evaporate during the paint spraying stage.

In the painting process, a car is sprayed over with basecoat (color) and clearcoat (topcoat) a number of times. If the sprayer fails to observe the flash-off time in between coats, trapped solvents under the succeeding coats will find a way out creating microscopic bubbles.

These tiny holes become very evident during the rainy season when moisture enters the holes and manifests as blisters only to disappear when the sun shines and the moisture evaporates. The long-term effect of blistering is more damaging - as a result paint chipping and lifting will take place.

Cars refinished with Acrylic Lacquer (1K) are more susceptible to blistering. These type of paints have very low film build per coat (low opacity) , the sprayer has to do twice as much sprayovers thereby increasing the probability of failure to observe flash-off times.

In essence, paints are viscous; solvents and thinners are only vehicles for pain to be sprayed on a substrate or surface and should completely evaporate first during the drying process.

Very informative, thank you Sir Raul. Yung anggi ng ulan o spray of rain di ba nakakaapekto sa quality yun ser? Actually yun ang worry ko and flooding kasi sa Marikina yung mga prospect shops ko.

**samcoy** · August 13th, 2012 01:58 PM

Ser RNA, ano bang magandang sealant ma-rerecommend mo ser? Yan nga yung iniisip ko eh for added paint protection next time.

**rna800** · August 14th, 2012 07:38 AM

Originally Posted by samcoy

Ser RNA, ano bang magandang sealant ma-rerecommend mo ser? Yan nga yung iniisip ko eh for added paint protection next time.

You could try the Klasse/Carlack 68 twins (Klasse All-In-One and Klasse Sealant Glaze). Apply KAIO first then KSG next. Then apply wax for added protection and quick detailer products for maintenance. I am not sure where could find those exactly but some people saw some in MC Home Depot or Big Bert's. You could also try to contact sir Ed if he has in stock.

Here sir, try to read in tsikot's auto detailing section http://tsikot.com/forums/auto-painti...tenance-77542/ You will learn a lot.