Unless you have Non profit status ( are you non profit?- hope not) approved by the Post Office, you will not be looking at 14 cents.
You could send out presorted Standard Mail 200 piece minimum for about 26 cents. These would be letter sized mailings.
Or you could send out First Class...
If you are non profit, and you use automation rates ( Think CASS certified Barcode-200 minimum at a time ) you can send a LETTER for around 12-14 cents. I believe the lowest Post Card rate is First Class at about 26 cents.
I have attempted to use this stuff on 2 different occasions. Each time , I gave up after correcting the hood. This stuff sticks like dried cement. I use the same technique using SIP , 85 and 205 with no problems.
What is the trick to removing the dried product? water hose and rag?
Assuming that you do not drop in on a gravel driveway, how many cars do you expect to get from a single pack? I did 2 cars this weekend and was wondering what is normal?