How to make a scratch off lottery ticket?

You probably know the scratch off lottery tickets? Ever wondered how to make them? Well, they are very fun & easy to make.
I used to make greeting cards from them but now I'm going to use this technique as a promotional tool.
I made 25 scratch off tickets and will include 1 ticket with every order I ship.
On one of those tickets, there is a coupon code and a value of 25 dollars to spend in my shop on Etsy. Waaaahhh, exciting! :)

Here is what you need:
cardboard, a print-out of your lottery ticket, glue stick, sticky back plastic (contact paper), metallic acrylic paint (preferably silver) and washing liquid.
I prepared the paper cutting beforehand so I'll skip that part in the tutorial. :)
Beforehand you print out a design that you want to be on the scratch off lottery tickets.
If your printer can take thick paper you can print it directly on the cardboard and skip this part. If you do it in two steps, it is nice to get a fun color background paper and glue the design onto the card.
Then you take a piece of sticky back plastic and put it onto the design.
Mix some metallic acrylic paint with washing liquid. Try to use 1 part washing liquid and 2 parts of paint. Mix the substance.
Paint the plastic part on the ticket and let it dry.
Make sure that the picture underneath the paint is hidden. Add another layer if this is not the case.And then... scratch! Oops, no luck for me! :(
But you can certainly win a 25 dollar certificate if you are one of my next 25 customers in my Etsy shop. Happy shopping! :)