Are there measures we can take to minimize the yellowing of white plastic?

I know we got obvious ways of dealing with this such as:
1) don't expose it to direct sunlight
2) don't expose it to moisture
3) don't grease it up with your hands, etc
But is there a special means to help?
For instance, if we sprayed on a layer of clear coat acrylic that is used to finish up custom paint jobs, would that help?
I mean I look at the plastic lawn chairs I have...
They are plastic, they are white, and yet they don't yellow.
Is it because they have a special coat layer?
Any input is welcomed! I am trying to figure out a way to preserve my Revoltech Ultra Magnus, it is a great figure that needs to be posed! But I would hate to see it go yellow over the years
Best Regards,
Ed
1) don't expose it to direct sunlight
2) don't expose it to moisture
3) don't grease it up with your hands, etc
But is there a special means to help?
For instance, if we sprayed on a layer of clear coat acrylic that is used to finish up custom paint jobs, would that help?
I mean I look at the plastic lawn chairs I have...
They are plastic, they are white, and yet they don't yellow.
Is it because they have a special coat layer?
Any input is welcomed! I am trying to figure out a way to preserve my Revoltech Ultra Magnus, it is a great figure that needs to be posed! But I would hate to see it go yellow over the years

Best Regards,
Ed