THREE RHYMING RIDDLES

1)
I'm seen by many, but noticed by few;
It's what's beyond me that comes into view.

2)
I hover over sacred flesh,
An infinite arc of valor;
A nimbus to those who pass the test,
Who live with love and honor.

3)
You do this in a vessel for getting you clean,
You do it to fabric so you won't be seen;
You do it when for an answer you come up short,
You do it in a match of a certain sport.

Answers:

1. Window
2. Halo 
3. DRAW:

Draw a bath
Draw curtains
Draw a blank
Draw in chess