Having done my old Raleigh there are a couple of things...
Reynolds 531 decal went on and stayed on no problem, very good adhesive, never needed to lacquer over it.
I got some Raleigh decals and they were crud...possibly because i made the mistake of getting my fingerprints on the adhesive and being a bit ham fisted. Somehow you've got to avoid touching the adhesive and dont stress or deform the transfer.
I pulled them off shortly after, they just looked a mess. Ideally i suppose a quick spray of lacquer over the top would really fix them and help stop them from getting scratched.