glare, glair

Glare or glare means harsh bright light, direct or reflected--
The glare on a bright day can make driving difficult. Be careful.
The glare from the snow on a bright day can be hard on the eyes.

Glare also means an angry stare--
He is afraid she will glare at him in silence when he gets home.
Why did you mention that? Didn't you see him glare at you?

Glair or glair ( rhymes with glare ) means the white of an egg--
You will need to separate the glair from the yolk.
If you coat that with glair, the paint won't show through.
Glair may also mean a paste made with egg white, or to coat something with egg white--
You can treat that canvas with a glair paste.
If you glair the canvas first, the paint will adhere better.

Now that you know that, you can say--
"He coated this with two coats of glair, but you can still see a glare when a bright light shines on it."