Paint stripping to easily

Sounds like you didn't let the paint cure long enough nor the future. I typically let paint cure for at least 24 hours before I apply pledge and then wait at least 24 hours to let the pledge cure as well. I also make sure I wash my model parts water with dishsoap, rinse and dry well before assembly. One other thing, primer before paint and let it cure as well before applying paint. If you did all that then I don't know what the issue may be.

You didn't mention if you primed before spraying the base coat. In the past, I have sprayed Vallejo acrylics without primer and they peeled, even after letting then cure for several days. 

Also, welcome to the forums!  

I agree with Bruce. Vallejo does not adhere well, the surface needs to be primed with a proper primer that has some bite. I advise against Vallejo primer. Maybe try a real primer like Tamiya Surface Primer, Mr Surfacer, Stynylrez (a great non-solvent based primer), etc.

I made the same mistake starting out with Vallejo and acrylics in general.

As others have mentioned... always spray a coat of primer before painting. Certainly let your paint cure completely before applying Future or any clearcoats.

While I’m not a fan of Vallejo paints, I can suggest using another brand instead ... Mission Model, Testors Model Master, LifeColor, etc...

Thanks all for answering!

I forgot to mention that I did apply a coat of primer. I'm not sure how good it is, as it is a Shikiso primer (an argentine and mostly unknown brand). Also i'm not sure if I applied correctly, is the first time I used it and wanted to avoid creating a too thick layer. 

Also, I do not think it is the curing time. I did not have to much time, so the model was untouched for a few days between layers.

I have been using Humbrol enamels up to now, this is my first try with airbrushing acrylics. It is pretty difficult to access to other brands where I live, so I will probably stick with Humbrol for now.

I have another question, how should the Future (or any other gloss coat) be applied?. I have seen that if I apply a light coat it does not becomes glossy at all, but I don't want to spray a layer that is too thick.

Thanks!