Hi geeks. I have a lady in a couple weeks time we usually bleach her roots up then tone with nxt 8.12 for a silver grey look. She wants a complete change and wants to go copper all over (goldwell 8kg 8k with some 8nn for her grey) best way to pre pig for this am I right in thinking to just do a semi colour all over First of an 8g??? I haven’t pre pigged in years so any advice appreciated