How long did you wait between sanding and the sealant wipe? I ask because I had almost the same thing happen on my old Civic, and it turns out I was rushing that last step. The sanding gets all the glory but you are right, the wipe is what keeps it clear. Mine clouded back up in about 6 weeks the first time, then I redid it and hit it with a UV wax every few months and it held up way better. Twenty minutes in the driveway beats paying a shop, no question.

My aunt ran a consignment shop for years and she had this thing where she'd tape a flyer to the front door and stand across the street to see if she could read it. If she couldn't, back to the printer. Reminds me of your rummage sale problem because she stopped caring what the font looked like and only cared if some guy driving by could catch the time and address. Funny part is her best flyers were the ugly ones she made in five minutes flat. People don't study a flyer, they glance and decide. Save the four hour font hunt for the church Christmas program or a wedding, not a rummage sale.