If you use Tamiya thin or their super fast setting which works better . Place a small drop of glue on the decal and it will suck it right down . Even works over surfaces already sealed . Try in a same area fist though .
Whaaa? I'm going to have to make an effort and try this. Mind blown.
Ok, so I did try this.First I want to stress that I'm not disputing this hasn't worked with anyone else, but just reporting my experience and observations.
I tried it on some Airfix decals, that didn't have a clear coat. I used Tamiya extra thin and I wiped the brush tip down so I didn't have any risk of it wicking where I didn't want it. Straight away the cement attacked and dissolved the ink and smeared it around.
Next I tried it on the decal sheet, but just with a drop to avoid any risk of smearing the ink, but again, it attacked the ink right away and also tended to wick away from where I wanted it.
Quite possibly there is a workflow where it works well, my testing was all of about 5 min but based on those observations, it's not something I'd be doing again.