Glenn's right, and yes, the Revell kit is the Monogram kit. Don't know what it's like now, but originally it came with a framed canopy and a 'Malcom' hood canopy, and the rear windows were thinner at the joint on the framed canopy, to make separation easier. That part shouldn't be a problem, just be careful as you cut off the windows. Separating the framed canopy panel isn't difficult, especially if you have a razor saw. Just take it steady and slow, and to avoid scratches if the blade slips, place masking tape either side of the cut lines. Do these one at a time, starting with the cut from the rear of the top panel to the windscreen, then from the windscreen frame, doen the port side panel. Separate the top panel from the port side panel once the part is on the bench.
For masking the blue, there won't be enough precise control with liquid mask, even if it's 'over' masked and cut to shape. It's better to use pieces of tape, cut to shapem and trimmed when in place if neccessary. A number of pieces will be easier, normally, than one or two large pieces, due to the curves.
As Glenn stated, there isn't so much of a problem for the white with OD and NG, but it can be easier to do the white first. It's a case of what ever is easier to mask and handle, but try to do the white first, as it is he lightest colour, and won't then be affected by the darker shades; the blue isn't so bad, as that will take well to the OD.