You could follow my tutorial for painting tile: https://www.aratariathome.com/blog/painted-tile-tutorial-entry-way-makeover-part-2
This tutorial might help: https://www.youtube.com/watch?v=rTRWdIVQ-bU
What surface is your existing back splash?
Check all those pins https://www.pinterest.com/search/pins/?rs=ac&len=2&q=how%20to%20paint%20over%20a%20tile%20backsplash&eq=how%20to%20paint%20over%20bacon&etslf=11308&term_meta=how%20to%20paint%20over%20a%20tile%20backsplash%7Cautocomplete%7C3
Whether it’s tile or plastic laminate, you’ll want to buy the right paint system for the job and follow the directions to a T.
This is how one blogger painted her tile backsplash.
Hi! Hope this helps:
The appropriate paint will depend on the materials currently on your backsplash. Buy paint that will work on the speciic surface and follow instructions on the paint.
It’s going to depend on what’s existing. You’ll need to find something that’s easily cleaned and can stand up to kitchen mess, wear and tear.