Has any one else noticed that engine bay and underside of bonnet has only got primer or undercoat on it.

Cheaping out a bit isnt it

About to do the cut outs for some windows. Wondering what people have been using to prime the raw metal edges. I was just going to use Metal Primer with added Fisholene. That's what I normally do on metal around the house and it seems to work pretty well. Thoughts welcome.

Thanks
...