I needed some half A4-sized customised signs (adhesive or screw-on) to go outdoors. I got prices. They seemed high. I wondered if I could print the signs and then lacquer them. I experimented with a laser printer, and different papers and cards. It was amazing how the different papers reacted differently to the lacquer. In the end I printed the signs on matt card; the expensive stuff that we make our Christmas cards on. I found that Range sold two types of clear lacquer so I bought an aerosol of each. One proved to be perfectly clear, the other left a very slight yellow cast. I applied the clear lacquer with the cards flat on the bench. I gave them about twenty very sparing coats over two days. The card did not absorb the lacquer at all. The result was very good. I fixed the signs up with industrial impact adhesive. They have been out there for three months now and they haven't deteriorated. It doesn't matter if they do really: they're easy enough to replace. It's useful to be able to do this. I produce the little posters for various local 'dos' and this will be better than laminating them, which has never been all that satisfactory.
Bill