We have never and will never use vinyl lam on perf. It doesn't look good nor does it hold up well.
You should try ClearShield Classic liquid lam. It comes in Glossy, Semi Gloss and Matte finishes. Fellers carries it, but I'm not a huge fan of Fellers. We typically get it from Advantage.
Apply 3 very thin, light coats with a smooth sponge paint roller. Do not glob it on or the perf holes will get clogged up and the job will look terrible. Soak the roller, then roll off the excess liquid lam onto a scrap piece of coro or something. Using little to no downward pressure, just the weight of the roller, roll liquid lam onto a section of the perf until roller is dry. Repeat to complete 1st coat. If you press too hard with the roller, the liquid lam will clog the perf holes. I can't stress this enough. Use multiple thin, light coats. Let first coat dry to the touch. Repeat until you have 3 light, even coats.
We use ClearShield Classic Semi Gloss on most everything we do. We also keep the matte in stock for certain situation. It's a great product and holds up very, very well.
Good luck!
Andrew