I too use the gel variety of super glues. But as with Extra Crispy (lol, so hard to actually refer to you by that name!) I like the Gorilla brand.
Any gel CA glue will likely work for you. But it seems that the Gorilla brand adds something that makes the final dried glue bond a bit more flexible. Just a bit. I read it in their lit once, and I have found it to be the case in other uses of their glue. Haven't seen it make much difference at this scale, but even the littlest bit of flex makes glued-on items less likely to "pop" off when mis-handled.
As to base colors .. and presuming you mean the under-coat rather than the color of the aircraft base, I offer my own preferences. Much of my Italian force is done in continental colors … this gives me the flexibility of using them for the campaigns on the Eastern Front, Sicily or even Tunisia (many units sent near the end of the North African campaigns were not re-equipped for "tropical" service). So many of my aircraft are done in simple green. I use Testor's Model Masters Medium Forrest Green (in spray cans).
Macchi C200s covering a troop movement.
I also have Macchi C202s awaiting completion. They have been base-coated for Mediterranean service as described below.
My BA65s. Here I was just lazy. Should have done them in Mediterranean colors, as they were used primarily in the early years, and were not used on the Eastern Front or in Tunisia.
For the aircraft painted for Mediterranean / African service I use a base-coat of Model Master's Afrika Mustard, and then add a camo pattern on top of that.
One of my SM79s. I have 2 in this pattern, and 2 more awaiting completion. I am debating re-painting the first two and finishing the other two in a different pattern.
My BR10m's. I actually prefer this pattern over the one on the SM79s. I purposely diluted the green for the camo, to soften the color spots. Think it worked out reasonably well.
Just my $0.02 USD worth.
-Mark
(aka: Mk 1)
