How did you get over the last threshold to fluency in Spanish?

[London2Baires]

Yes I found Fijador Sellador but not sure if its actually a primer or sealant... Seems like it is a cheap way to paint walls before applying the expensive paint but not sure...

Yep, that's what they use for primer here. Something like tvis:

Mercado Libre

 

[Wryter47]

Any tips? I am perfectly fine making small talk with uber drivers, taxistas, waiters, etc... But what did you do to get to the point where you could speak with ease on a complex subject, like going into OSDE to deal with administrative stuff, speaking with co-workers in Spanish, etc...?

And what does one do when he has 14 thresholds?