I have a client, base about 7, who has been having bleach lights, the look lovely but she wanted to go a bit darker for the winter, I did 2 to 1 alternate 6/7 and bleach, looked great when it was done but has very quickly faded out. Now I thought I heard this but thought I check it's right first! can I pre pig with a light swipe of red then go straight over with 6/7 all in the same foil ??? !