I think shortening would be good. Only if its for your lips.
vaseline is a very good subsitute for chap stick but it makes your lips very shiny:)
vaseline
scapes substitute
A good substitute for chayote in a recipe is zucchini.
Lemon juice is a good substitute for vinegar in a recipe.
Good that can be used in place of another good.
Vaseline is totally bad for rashes, if you have emmoilient cream or moisturiser that would help, but vaseline actually makes rashes worse and can cause skin disease if you are not careful. Use moisturiser or emmoilient cream Jenny A Doctor
Plain yogurt is usually a good substitute for mayo.
Yes, finding a substitute is a good option for this situation.
A good baking substitute for vegetable oil is applesauce.
A good substitute for beer in chili is beef or vegetable broth.
A little bit of vaseline is great for chapped lips.