I have used latex for many patterns over the years and have found the secret is the grade of latex used. I use a medical grade latex and apply a thin coat of either Softbody or Soft-tex after the color is applied. For the extra air bubble "sparkle" I rib them with a strip of prepared organza ribbon. Then trim the organza to get the effect I am after.
They have served me well over the years.



Latex and Prepared Organza Rib



Color and Light Coating



Finished Pattern