Yellowing white paint

[Bad Turbine]

If I paint my L-1011 with appliance paint will it yellow.Every white paint I have used has yellowed with age.

[arnobiz]

Use acrylic. Most enamels will yellow due to solvent issues from what I understand.

[Lancer512]

Somebody here mentioned before to add one drop of blue to a new tinlet of white paint. Then use a drop of this blueish paint on a new tinlet of white paint, which you are going to paint with.

And don't use enamel clear coats. Use Future instead.

Edited February 24, 2013 by Lancer512

[Netz]

Test your appliance paint 1st on some scrap, It's an epoxy made for metal and might melt your plastic.

Curt

[Bad Turbine]

Thank you guys, that gives me some direction. Double thanks to you Curt, that 1/100 L-10 is hard enough to get without turning one to goo!

[Triarius]

All clear coats, and all gloss whites yellow over time from exposure to ultraviolet light. Some acrylics are more resistant (like Future), but they will all do it eventually. The blue tinting works, but eventually the problem will return. The best solution is to limit the exposure to UV.

[breadneck]

I think were in need for some reverse psychology here. How about paint it yellow and wait for it to become white!

[Triarius]

There are some other things you can do to help:

1. Undercoat the white with silver.
2. Use a flat white for all but the last coat. Flat whites have a higher pigment load and far better hide than glosses. They also don't keep adding clear gloss binder, which is what actually turns yellow.
3. Don't use a gloss white at all. Use only flat white and overcoat that with Future, which is highly resistant to yellowing.

[DutyCat]

There are some other things you can do to help:

1. Undercoat the white with silver.
2. Use a flat white for all but the last coat. Flat whites have a higher pigment load and far better hide than glosses. They also don't keep adding clear gloss binder, which is what actually turns yellow.
3. Don't use a gloss white at all. Use only flat white and overcoat that with Future, which is highly resistant to yellowing.

What he said.

[Bad Turbine]

Sounds good, thanks everybody.

[Spectre711]

How about just using white lacquer paint?

[Bad Turbine]

Lacquer does't have the same problems?

[Triarius]

Since it's the clear component (binder) of the coating that yellows, lacquers are also vulnerable, although some are more resistant.

[Bad Turbine]

Man you guys are full of info,I never really thought about the contents of paint till I notice all my pretty model were looking like bad teeth.

[Triarius]

I'm a retired materials scientist, and I once worked directly in the coatings industry. Hence my "resident paint geek" and sigfile. :coolio:/>

[Bill51sdr]

It has been my experience that white automotive lacquers do not yellow. I have used them on several models and they are fine as long as your final gloss coat does not yellow. The only drawback is the expense, but then, have you ever seen a white car's paint job yellow? :)

[Triarius]

It has been my experience that white automotive lacquers do not yellow. I have used them on several models and they are fine as long as your final gloss coat does not yellow. The only drawback is the expense, but then, have you ever seen a white car's paint job yellow?

Yes, I have. Automotive lacquers are, however, formulated to be as resistant to yellowing as possible. For a scale model, they are rather expensive, but you get what you pay for. If going that route, why not use an automotive clear as a final coat?

[Bill51sdr]

If going that route, why not use an automotive clear as a final coat?

Agreed & in the past I have with nice results. Pricey? Yes but worth it IMHO.

[dnl42]

This is excellent info!

[Flemming Hansen]

Hi

If you can get it use Tamiya spray TS26 over white Tamiya primer with a gunze gloss Topcoat B-501. That is recommended for racingcars that is bright white - and that will not yellow over time if 15 years is the timescale...

Best regards

Flemming