Blend the color onto the adjacant panel making sure the edge of the adjacant panel is covered solid like your repair panel then clear both panels stopping your first coat of clear about 6-8 in. before the end of the blend panel if it butts up to another panel say for instance a qtr, then on the second coat cover the entire panel.I don't know if that's the type of repair your doing (assuming it's something like fix a fender) If the repair is small enough you may be able to blend within the panel.This will help keep your blended clear part of the panel from being darker.An example of what I'm trying to explain would be to tape off your door, clear it solid with the 2 coats and it will look darker than the rest of the car even though you only cleared it.
1978 Z-28 purchased new by me -$6750
to view present state photo
Look above for glory days.
1982 350 S-10