[hijack on request]
Well, salt scrubs (and their close cousin, sugar scrubs) are easy. Take a bunch of coarse salt or sugar, put it in a jar or empty yogurt container. Add oil, leaving about an inch of room to spare. Add essential oils of your choice. Shake. Lightly scrub onto your skin and rinse off. (Be careful! Your tub will be slippery due to the oils!)
What oils? Grapeseed is good. Unrefined coconut oil and canola are good. Jojoba, but I never use all jojoba, it’s just too expensive. Ditto almond, carrotseed and rose oils - I’ll put a little bit in, but the bulk is usually a cheaper grapeseed. Even olive oil is pretty good, but usually too expensive to be my first choice.
Essential oils? The list is nearly endless. Peppermint gives a great pick-me-up and is very invigorating for tired feet. Chamomile, and lavender are soothing, and also good at clearing many reddened skin conditions. Rosemary is fantastic for sore muscles and fatigue from overexertion. Ylang ylang, sandalwood, vetiver and rose are just indulgent yumminess.
Massage oils are the same, minus the salt or sugar. For massage oils, I use a 50/50 combo of grapeseed and canola oils for the base. It gives the ideal blend of lubrication without stickiness, and staying power without greasiness.
Bath salts, the same minus the lubricating oils. Epsom salts and sea salts mixed are my favorite, with essential oils. Use a big yogurt container and give yourself lots of shaking room. Dissolve a Tablespoon or so into the bath as it’s filling.
My favorite facial is plain yogurt mixed with honey. It’s a little drippy, but the drips are yummy, so who cares?
Some people like egg whites, or whole eggs, but I find they make my skin too tight. YMMV.
Did you know watermelon whirred in a blender (rind, seeds and all) makes a great toner? Add about 30% witch hazel and it’ll last in a sealed bottle on your shelf for a couple of months.
Lotions are harder to get right, because you need to emulsify your basic oil mix with water. Purchased products use any of a number of additives to keep their lotions lotiony. Beeswax is a pretty good one, as are eggs (but obviously using eggs shortens the life of your product dramatically!).
I highly recommend The Herbal Medicine Maker’s Handbook: A Home Manual for anyone interested in making home toiletries. While there are toiletry specific books out there, this one is the best at explaining theory and technique, not just listing recipes. Ignore the medicinal parts if you want, but you’ll learn to make the best lotion ever regardless of how you feel about herbal medicine. It’s also unexpectedly funny, as the author has a great sense of humor. What could be a boring textbook is in fact a very enjoyable beach read.