A second day of priming and some good results. I decided to use gesso, first spraying with water to retard drying. I slapped on a lot and used a spreader at first, then when the layer was reasonably even used a sponge roller.
This was slow work. The paint was so thick and wet that the bubbles when rolled were quite large. This, I've discovered, can be fixed by rolling when slightly more dry. I continued to roll until smooth, then dried with a hairdryer. Then I sanded the surface. Winsor and Newton Gesso has a jelly-like consistency and it can be sanded quite well, a good balance between a plastic and hard feel I think, for an acrylic gesso.
After sanding I sprayed again and applied a second coat, this time spreading with the sponge roller. Less paint needed. Then dry, then sand. The result was even although the texture of the canvas remains very visible and there are lots of tiny holes. That can't be helped. This is as good a job as I've done, and from the back when held up to the light there are no blotches or signs of lack of homogeneity.
Good! After that I rechecked the corners with a huge steel L, then traced the underdrawing using a fine embossing scribe. The painting is now ready for paint!
Key lessons:
1. Good light! Checking every bit for evenness while applying each layer.
2. Retarding drying with water spray, then drying with a hairdryer when even.
3. Practise. The lesson that every student hates to hear and loves to ignore.
This is "Now I've Tasted Love There Is No Going Back To A Loveless Life", the second in a series of three big square paintings. It's not a triptych, just three same sized paintings on a theme. I probably won't start painting until next year and should finish by this time next year.