Bubbling lacquer paint problem

[Kranz]

I have a small (5mm diameter) blister on the front wing where it appears the lacquer has delaminated from the basecoat. It sort of looks milky or cloudy.

 

Now, I don't want this to spread so I'm thinking of possible solutions.

 

I thought a hypodermic & syringe with a little lacquer in will do the trick. If I stick an ultra fine needle in, suck the air out and then inject just enough to fill the gap will this work???

 

The new lacquer should be drawn all the way into the blister by capillary action and then bond the two paint surfaces together again.

 

What's my chances of it working?

 

Oh, and if anyone else wants to try it I have 9 needles & syringes spare

[mr lover]

this started on my last supra and got steadly worse so its got to be worth a try

[Tricky-Ricky]

Worth a try, but i suspect it is down to base coat contamination or to long between base coat and lacquer, unless its a stone chip, has the area been repaired?

[Kranz]

I think its a stone chip that delaminated it but didn't break through the lacquer.

[Kranz]

Had a go at this today.

 

Broke out a can of lacquer and sprayed some in the lid, then sucked it up into the 2ml syringe (plenty big enough).

 

The bubble I have looks to be a separation caused by a stone chip, but it hasn't broken the surface so it may be that there's a small dent leaving the lacquer in the original position and the basecoat going in with the dented metal.

 

Using a 25G needle (0.5mm) I gently broke the surface of the lacquer and immediately the lacquer flowed from the syringe into the bubble. Giving it a tiny bit of encouragement on the syringe helped fill the gaps almost entirely, but it has left a very small ring around the edge of the bubble.... possibly where the gap between lacquer and basecoat is too small for the liquid lacquer to flow into.

 

Overall looks 98% better though! And the needle leaves no visible mark as the hole is filled with lacquer.

 

Had a go at my rear bumper that I'd damaged reversing into a wall

 

I over filled the massive bubbles there, causing the old lacquer layer to dissolve!!!

The way to do it properly is a tiny bit at a time, so a very small amount flows into the edges of the bubble and starts to reduce its size. Putting pressure on the area the lacquer has just flowed into helps, but you have to hold it on for 5 minutes. Once the lacquer has hardened then inject another bit, press it down etc.

 

Doing it this way a 5mm diameter bubble can be done in 5 mins, and a 5cm bubble would take about 30 mins.

 

Anyone wanting a syringe & needle I have 9 spare

[rick001]

I think this is very informative, i have 2 questions 1) Did you take any pictures to compliment your write up 2) why have you got needles & syringes?

[Kranz]

I think this is very informative, i have 2 questions 1) Did you take any pictures to compliment your write up 2) why have you got needles & syringes?

 

1) No, the Mrs has the camera at work for some strange reason

 

2) I bought them on ebay to do this. 10 was the minimum quantity in the size I wanted..... now have 9 spare.