Advice on making a surface smooth

[Guest]

I'm building a large USS Enterprise model from scratch. The saucer hull is going to be smooth, but I need advice and making it smooth. What material shall I use. At the moment, I am using caulk, but mixed with water. The effect is good. Ideally, I'd like to put something on that when it drys, it automatically smooths and levels imperfections.

Any advice?

[colin m]

Assuming there's no lumps and bumps to get in the way, I would treat it like a car. Use a good primer then very fine wet and dry to sand it back.

[Guest]

Cheers. Done it. Looks decent now.