Getting a cast iron skillet surface smooth I've had a Lodge cast iron skillet for about a year. A few months after I bought it I seasoned it with too much oil (I learnt later) and the surface developed some 'bubbles' that later started flaking. I've used it almost every day and while it is fairly non stick (I can fry eggs in it) I never managed to get a smooth surface on it. Here's a photo of how the surface looks 


. While the surface might look like it's flaking, I do not see flakes in the food or when I'm cleaning it. Do you suggest I sand it and reseason it, or will the surface eventually smoothen out if I just keep using it?
You cannot expect to ever have cast iron perfectly smooth. Its surface is uneven due to the manufacturing process, what producers like to call "pebbly" in marketing materials. 

The pan in your picture has not taken the seasoning in the best possible way, it could have been smoother without the thicker parts. But these are not the dreaded "flakes" of failing seasoning, just buildups which are strongly bound to the pan. 

If you insist on perfection, you could strip the pan and reseason it from the beginning, but it's lots of work, and there is no guarantee that your second try will work better than the first, you typically need to go through more seasonings before you get a feel for the craft. I'd say use it as it is, there are no noticeable downsides in the prepared food.