I've got several of these. The eyes are just painted on, so present no problem. The side mirrors are soft plastic and not that great, but workable. The mouth is textured, so you'll either need to replace a small panel at the front or file down the texture. I filed it down (very easy).
The biggest challenge, which isn't a huge one, is dealing with the hole in the roof if you remove the hair/cargo rack.
They aren't highly detailed, but great if you want a cheap option for humvees. In the US, you can find them at Big Lots for $6.00, or at Target, K-Mart, and Toys-R-US for a bit more.