Thanks everyone. It's a personal project for an otherwise great customer, a customer that gives us the freedom to do what we want with his stuff. However, he wanted a temporary sign, lasting about 3 months, double sided, and he said he wanted to use "Plywood". I let him know plywood wasn't going to work on Friday. Monday he calls and says "I finished that plywood, I just sent it over to you". They roll up, unload it, and it's normal, bottom of the line plywood with splits and cracks and really a rough texture, primed. I'm debating on reskinning it, but its something viewed from a distance, it's got a short life span, so I'm hoping I can get away with IJ-40. I don't want to have to buy anything for it, and I have the IJ-40 on hand.
I liked the IJ-180 because I could heat it and it would go into all the little cracks and look like it was painted on there. I was hoping I could get away with that same look with the IJ-40.