[HUMMERcustoms.com/TAZ]

I would look at letting them touchup the scratch first with the understanding that if it did not look good they would paint the roof. If they are good it can be done and not hard but, takes patience. If they tape up everything around they will not get overspray and just try not to go bigger than needed to cover scratchs.
Reason being, painting the whole roof You run into trying to blend where the top meets the side. It can be done no problem up at the top and not down on the side. No way to get around it. It is much harder and more room for error.
If You like it and I had My preference I would ask them about a two tone so that they bring the second color down to a hard line on the body just under the windows. Your hood, top, and top part of Your bed gets the 2nd color. Will look sharp! The more of the vehicle that gets work the less likely for anyone to see anything. to much for the eye to look at. The best way to deal with the paint where it meets with 2 different colors is to ask them to go with a wide pinstripe usually nice contrasting color unlike the 2 colors on the truck. It is the way We get away with having 2 colors on the custom work. You lay down the pinstipe either paint which I recommend or can be a nice tape and tape works real good if done right and cannot tell it from paint and easier to get a straight line as it is already done for them but, either way You have them lay it down before they start shooting the clear coats. If done the way We do it You will not be able to even feel the tape if that is what is used and if it is painted stripe then they wet sand, blend and smooth it all out till it feels slick as glass. If tape You play with the clear so it fills the edges and when hand goes over it, smooth.
There are some colors that you can do what is called a hard line where the 2 colors meet better than others. It is basicly taking someone who is good at hand pinstriping and they blend the upper coat of paint right to the edge of the bottom color with a pinstripe brush or airbrush and not have a contrasting color to break the 2 tones apart, also looks real cool. Then You still have to wet sand and blend the touch together. The color We find in the H2's that lends itself best to this process is the Stealth Gray. We are doing ghost flames with many coats of clear on My Stealth Gray and will most likely have to hard line around the edges of the flame. We were looking at 2 toning My daughters customized Tiburon with white pearl and Stealth Gray on the top that on a line that Dragon came up with and to make the Stealth look good Our man was going to have to hard line it by hand right up to the white. She changed Her mind and now We are doing pearl with blue flake and a dark blue metalic that matches the blue flake. That is what got Me thinking about Your 2 tone on the scratch. Anyway You will not see a Tiburon that looks as nice as this one or very few anyway.

But, It is a great chance to get a 2 tone if You like them and they will go along with it. They look good.

TAZ