Midwest cork.
Lay the track to your configuration on the table/sub roadbed.
Mark the track center line. (dots every few inches on curves, farther apart OK on straights.
Take up the track and draw a dark centerline smoothly connecting your marks (I use a black Sharpie pen)
Get some low/no odor contact cement...Weldbond green can at home improvement stores.
Separate the cork strips and coat the bottoms of the half-strips with the contact cement.
Coat the sub roadbed about 1-1.5" on either side of the drawn centerline.
Take a break...grab a beer...pet the dog...kiss the spouse...read a few threads on the OGR Forum...until the contact cement has 'dried' tacky to the touch....about 20 minutes or so.
Take a half-strip of the cork and lay the square edge along the centerline, pressing down firmly as you go. After a few strips are laid on one side, lay them on the other side of the centerline, snug against the first strips. Note: On curves, I've found it easier to FIRST lay the outside curve strips, followed by the inside, 'pulling' them snug to the outside ones.
If you have a brayer...a hard rubber roller...roll it along the top of the cork after its laid to ensure full contact of the mating adhesive surfaces.
That's it. Goes fast. Holds well. My min. radius curves are O-72, but I know others have used this technique on sharper curves.
BTW...re centerline marking...I actually just 'bounced' the Sharpie pen along the ends of the GG ties, both sides. Then, after the track was taken up, I placed a centerline halfway between these marks. The wavy tie lines also provided a nice guide for applying the contact cement to the sub roadbed. Just a hint.)
One last hint...after reading further responses: I'm undecided about ballasting. It's not a priority at this time, anyway, until most of the scenery is done (I'm not sure THAT will ever happen!) Ergo, after the cork was laid, I painted it all a medium gray color (cheap-o 'OOPS' paint at the local home improvement store) before fastening the track down. It serves to give the track some quasi-ballast pizazz in the near term. In the longer term, it will tend to hide the brown cork color if the ballast is thin in a few spots. Hey, works for me, Jack! (Sy-chologically speaking!)
FWIW....always.
KD