The decal above was made with $50 software on my pc and printed on my HP printer. I used Avery label paper bought from Staples Office Supply.

That one took almost no time to do. I copied the image from online but it was rough. Most of the dark lines were blurred and the colors weren't very vibrant. I used my paint program (the last upgrade version cost me $30) to fix all the problems. I sized up a number of versions of different sizes so I could match the size to the airplane and printed the block of them on a sheet of Avery label paper. I fuel proofed the paper with UltraKote clear spray and cut out the right sized MightyMouse and stuck it on.

The paint program is Paint Shop Pro and it cost me $60 when I bought the first version about 5 years ago. I didn't know to wait for it to come out in a new version to get the best price. If you wait for a new version, the last year's version will be marked way down. I've bought it for $20. Upgrades now are something like $30 usually.

Every paint program I've used will do almost everything that every other paint program will do. I've never used a free one. I've used a couple that cost BIG MONEY, but they didn't do anything worth the price. If they hadn't been at work, I'd never have used them. I wouldn't pay half their price to get them for myself. If they were $30, I'm not sure I'd go buy them today. Ain't nothing I can't do with PSP, and it was $30.

The decal below wasn't quite as simple.

The old gunfighter was just him, no background, nothing else, just the old guy.
I used PSP to layer a green bordered, white circle behind him. Then put a green bordered rectangle below. Then used the text tool to put the letters in the rectangle. Then sized up a bunch of different sizes and printed that out on the Avery paper. Took about 3-4 minutes. Sprayed the clear lacquer on. Took about 1 minute. Let it dry. Took awhile. Cut it out and stuck it on. Took 2 minutes.

I have two kinds of Avery Label paper. One isn't paper. It's clear and I use it to make lettering etc. The other is what I used for the two examples shown. Most pc printers don't "ink" in the color white. So I use the white Avery stock for anything that's going to have white in it. If it's not going to have white, I use the transparent. The transparent still needs fuelproofing because the ink isn't. No big deal. If you can spray paint with a can, you can do it.