I have the exact same problem. I have ingrows all over my legs but i wax instead of shaving. Lately i’ve been exfoliating with a glove and i tried this mixture that is supposed to work the same way as “Tend Skin” and consists in alcohol and aspirin. It helped me a little bit but still have some ingrows. Here’s the recipe:
Take twenty generic aspirins, crush them up well, into fine dust in a dry vessel or on paper. Take an empty one-pint alchol bottle, make sure it’s completely dry on the inside, fill it halfway with 70% rubbing alcohol. Add the aspirin. Shake well for at least four minutes. Notice with pure alcohol you don’t get the heat, because of no hydrolysis, that’s a good thing. After shaking, let the solution sit still while you do your epilating, waxing, or whatever. After all the chalks, talcs and calcium phosphates have settled to the bottom in a white dust, carefully “decant”, that is, pour off without disturbing the sediment on the bottom of the bottle the clear alcohol layer into another dry bottle. Viola, there’s your solution. It works fabulous and you can pour it in a squirt-type bottle just for ease of dispensing. Of course I’d use gloves when applying it and I’d use lotion right after it dries, and don’t use anymore than you would a commercial, off the shelf mix, remember aspirin is an biologically active ingredient, you don’t want to over do it. If you get chalk on your skin, then you didn’t seperate out all the sediment chalk carefully enough. Try again.
I’m going to start experimenting with adding a little witch hazel and dispensing it into a spray bottle for ease of application. But that’s me. Good luck, and make sure you don’t have any allergies to aspirin or alcohol before trying this.