Bob. Is it cold or damp, misty / foggy in your environment?
Blooming or synthesis for the testicle minded can be brought on by moisture content of the atmosphere.
There should be no need to use activator in a warm dry environment, ca dries in seconds when it's fresh.
Only impatient people use it cos they wanna see it finished before they start.
BLO does nothing to help so can be disposed of, it's down to technique of application and time of curing to get your finish right.
Practice on some scrap material and get your surroundings right, you'll soon find how to do it.
Avoid old ca and get some nice fresh stuff, hope reading this finds your fault.