I would still say she is a strawberry or red varnish roan.
Varnish is attributed to LP (leopard complex). She will probably get whiter and whiter with the color staying on her "boney" points, I.e. Legs, nasal bones, etc. Varnish can uncover spots, but will not cover them (means is the horse is solid as it vanishes, spots can appear where there was solid color, but varnish will not cover spots and cause them to disappear).