rough and smooth

Hey all. I used to magic when I was a kid and am just getting back into it. I've always been terrible at card tricks, I just don't have the dexterity to work them right. I'm wondering if it's possible to use rough/smooth to have 4 cards together as one and then split into two, then split into...

Before I say anything, can we all take a moment to acknowledge in awe as to how there has not been a discussion on this on the TXI forums yet (or atleast nothing came up when I searched for it)? Anyways, I've always wondered which roughing fluid works the best, or even if there is any...

I recently got my first ID and just had a few questions about it. It seems that even if I use lots of pressure while spreading, many cards flash. It only flashes a little bit, so only the white edge of the card shows, but it I feel like it shouldn't flash at all. Is it normal for the cards to...