I typically turn gridlines off on my sheets and then use borders for the lines. I have added icons to my Quick Access Toolbar to speed up the process.

You can add specific border icons to the Quick Access Toolbar. The Border drop down is shown below.

The icons I use frequently are highlighted in yellow

When you display the borders drop down you can right click on any of the icons and add them to your Quick Access Toolbar.

Having them on the toolbar speeds up applying the borders formats.