3d Print Grow Lines - Getting rid of

While looking around You Tube for the subject in the title there were a number of coatings that could go on. All were rather thick and could hide small detail. 
Then I saw this one: https://youtu.be/rn4edNztaPU

Basically you spray the model with a rattle can that sticks to plastic and then immediatly spray a gloss clear coat. The videographer then put it under a fan to speed drying. 
In the vid he did admit that his grow lines were fairly thick and that to cover it some detail was lost, but under small printing, the detail remains. HTH. 

For full disclosure, I haven't tried it yet, but I have the perfect model to try it on soon.  Thanks for looking.