Hi,
came across this method and gave it a try.

http://v5.rhino3d.com/m/discussion?id=6377196%3ATopic%3A99631
Equi distanced objects on surface

http://moi3d.com/forum/lmessages.php?webtag=MOI&msg=6602.2
Moi3d method of getting offset curve on surface

Created grid lines on surface using above methods and then
array along curves by distance and align to surface.

Cheers
Barry