How do I manipulate WebGrids?

I'm using ASP.NET and the MVC pattern. I have the following code which I use to style the columns:

<div id="grid">
    @grid.GetHtml(columns: grid.Columns(
            grid.Column("Amount", "Amount", canSort: true, style: "column"),
            grid.Column("ShelfLife", "ShelfLife", canSort: true, style: "column"),
            grid.Column("Size", "Size", canSort: true, style: "column"),
            grid.Column("Type", "Type", canSort: true, style: "column"),
            grid.Column("Unit", "Unit", canSort: true, style: "column")
    ))
</div>

I use the following code to load the data for the grid:

@{
    ViewBag.Title = "ListView";
    Layout = "~/Views/Shared/_Layout.cshtml";
    var grid = new WebGrid(Model, defaultSort: "null");
}

It's probably a long and trivial way of doing this... but I'd like to know how I can manipulate what's in the grid? For example, I'd like to add a button for every row. I'd also like to recolour every second row. How would I do this? Thanks in advance.