Orange peel and Blush

[mhorowit]

Apparently when applying rejuvenator or buty. dope, one is open to (at least) two problems; one being an 'orange peel' appearance, the other a whitish 'blush'.

I am told the 'blush' occurs when the solvent dries so fast in the presence of high humidity that it causes the water to condense. The use of a retarder helps resolve this problem

Why causes the 'orange peel' to occur? - Mike

[Guest]

Re: Orange peel and Blush

orange peel usually happens when there is not enough solvent in the mix to allow the coating to flow out smooth. try more solvent (thinner)

[mhorowit]

Re: Orange peel and Blush

How do you recover from a small patch of 'orange peel' - Mike

[crispy critter]

Re: Orange peel and Blush

Wet sand it lightly with a fine sand paper until it is smooth then try to buff or wax it until it shines or wet sand with a more course paper and re-spray the area.

[mhorowit]

Re: Orange peel and Blush

Any idea the cause? - Mike

[Pearson]

Re: Orange peel and Blush

STOP!!!!! Don't wax ANYTHING you plan on painting any time soon!

Orange peel is caused by the wrong ratio of air to paint leaving the tip of the gun. Too much paint for the amount of air means the droplets are large. To get smaller droplets turn the knob that adjusts the paint volume to a lower setting OR increase the air pressure.

Each paint gun, for a given viscosity of paint, has a best air pressure. If you are using the correct air pressure for the viscosity, and you are getting orange peel, you need to LOWER the paint volume. This means you will have to paint slower and take longer to do the job.

You CAN change the viscosity by increasing the ratio of thinner to paint, but this can cause other problems if you add too much thinner. It is best to use the paint manufacturer's instructions on how much thinner to use.

Other things such as outside air temperature, temperature of the surface being painted, type of thinner being used (fast or slow drying), distance of gun from the surface being painted, and speed you are moving the gun, all play a part in how well the paint flows out. Proper lighting is critical. If you stand straight behind the gun, you can't see how the paint is going on until you have moved over a foot or two. Try painting with the gun out to your side and your eyes close to the surface being painted. That way you can actually see the paint droplets as they hit the surface. It is a delicate balance to move the gun slow enough to put on enough paint to make it flow, but not so slow that you end up with too much paint and a bunch of runs.

Try doing everything exactly the way you were doing before, but turn the paint volume down and reduce the speed you move the gun. If you suspect you are putting on too much paint, finish out the panel you are working on and just wait until it is dry before adding another coat.

[crispy critter]

Re: Orange peel and Blush

Mike,
He is right about the wax however,if you decide to wet sand lightly and wax it then your still not happy with it and want to re-spray just use some laquer thinner or wax stripper to clean the wax off then wet sand with a courser paper and re-spray.

[mhorowit]

Re: Orange peel and Blush

Guys - I got this effect when I was brushing on rejuvenator - Mike

[jgerard]

Re: Orange peel and Blush

I wonder if the area affected is not painted with dope, but some other product?

Jason
N43643

[Pearson]

Re: Orange peel and Blush

Mike,

Sorry! I guess I should read the original post before going into a diatribe about how to spray paint.

I know all about painting, but don't know squat about rejuvenating. I'll bow out gracefully now and let someone with rejuvenator experience step in.

Cheers,