We would suggest using a bitter spray designed specifically for bunnies or small animals and we would not recommend using home-made alternatives you may have heard about such as chili, clove oil or perfume.
Bitter sprays can be purchased from most pet stores or on-line and typically come in the form of a pump spray or aerosol containing a liquid that is designed to have an unpleasant taste. The idea is that you apply it the areas of you home that you don’t want your bunny to chew in the hope it put them off.
Although bitter sprays can help prevent some chewing, the natural urge for a bunny to explore it's environment by nibbling a bit here and a bit there can be very hard to stop. It’s always best to do some bunny proofing as well and provide lots of alternative chewing toys alongside areas that may be chewed to keep your bunny out of trouble.
The first thing to do is identify the area where you think your bunny is going to chew and cover all these areas so that you don't simply move the problem along to another spot. Doing this proactively will also help prevent habit forming from the start. To apply spray simply follow the instruction that come with the product.
If you want greater control over what is covered then it can be helpful to spray the liquid on to a cloth first, then wipe it on the areas you want.
Remember to reapply the spry regularly so it remains effective.