There is no definitive answer, as it depends on personal preference. Some people recommend using a brush and soap first to build up a lather, then applying the aftershave of your choice.
When used with a shaving brush, shaving soap gives a thicker lather. It lasts more than a tub of shaving cream. To get the most out of your shaving soap, we recommend building the lather in a bowl or mug.
What To Do With Shave Soap After Use?
You don’t need to rinse out your soap after you use it, but make sure you dry it out before putting the lid on it. I recommend wiping out the excess lather from the container rather than rinsing it off because the longer the soap is exposed to air, the more fragrance is evaporated away. 
Can You Shave With Shaving Soap?
When used with a shaving brush, shaving soap gives a thicker lather. It lasts more than a tub of shaving cream. It doesn’t take as much work to build a lather from shaving cream. 
Do You Leave Shaving Soap In The Bowl?
The method that is most convenient for you is the one you should choose. To get the most out of your shaving soap, we recommend building the lather in a bowl or mug before applying, as it yields the maximum amount of lather per shave, which is best for a large area of shaving needs. 
Can You Use Shave Soap As Aftershave?
The bar shape of shaving soaps is similar to normal hand soap. Along with an excellent aftershave routine, shaving soaps provide much-needed hydration for your face and contribute to your signature scent. 
Is It Better To Shave With Soap Or Shaving Cream?
Thought of as the traditional method for wet shaving, many experts feel shaving soap can provide an equal, if not better, cushion and lubrication to shaving cream. Requiring more attention to detail, shaving soap can also give you more control over the lather itself. 
What Makes Good Shaving Soap?
The triple milled hard soaps cost a little more, but they are usually the best shave soaps. 40 to 50% fat level is optimal for a good soap. Good lubrication and skin protection can be provided by a high percentage of fat. 
Frank Harmenstein is the lead editor of the grooming website Cut Throat Straight Razor, and has over 15 years of experience in the industry. He’s personally tested and reviewed over 200 different straight razors, and has written countless articles on the subject.