Needing to pick the brain(s) of a few hair wearing vets, so send me your knowledge.

I read on some random forum about a lace/glue combo for front hairlines.
Does anyone do this/can shed a little light on the topic?

If so, what are you using and how long is the hold time?
Do you find that you get less "gluey hair" problems from excess glue seeping through lace?

Thanks.