Cleaning Up Rectangular Supports on PLA  

Cleaning Up Rectangular Supports on PLA

Hi,
I recently printed this model at 0.15mm resolution and rectilinear supports. The print came out very well, and everything was supported properly. However, The places where the supports touched the object perpendicularly are a little messy after pulling off the supports. How can I 1) clean it up (including the tight places) and 2) possibly adjust print settings without affecting the quality/effectiveness of the supports. I'm using Slic3r Prusa Edition.

If you're interested in what this model is, it is a reconstruction of the first discovered Naledi skull. Here it is next to the cast version.

Here is the slic3r config export for this print:
# generated by Slic3r 1.33.8-prusa3d-win64 on Tue May 9 18:08:15 2017
avoid_crossing_perimeters = 0
bed_shape = 0x0,250x0,250x210,0x210
bed_temperature = 55
before_layer_gcode =
bottom_solid_layers = 7
bridge_acceleration = 1000
bridge_fan_speed = 100
bridge_flow_ratio = 0.8
bridge_speed = 20
brim_width = 0
clip_multipart_objects = 0
complete_objects = 0
cooling = 1
default_acceleration = 1000
disable_fan_first_layers = 1
dont_support_bridges = 1
duplicate_distance = 6
end_gcode = G4 ; wait\nM104 S0 ; turn off temperature\nM140 S0 ; turn off heatbed\nM107 ; turn off fan\nG1 X0 Y200; home X axis\nM84 ; disable motors
ensure_vertical_shell_thickness = 1
external_fill_pattern = rectilinear
external_perimeter_extrusion_width = 0.45
external_perimeter_speed = 25
external_perimeters_first = 0
extra_perimeters = 0
extruder_clearance_height = 20
extruder_clearance_radius = 20
extruder_offset = 0x0
extrusion_axis = E
extrusion_multiplier = 1
extrusion_width = 0.45
fan_always_on = 1
fan_below_layer_time = 100
filament_colour = #FF14E2
filament_cost = 0
filament_density = 0
filament_diameter = 1.75
filament_max_volumetric_speed = 0
filament_notes = "List of materials tested with standart PLA print settings for MK2:\n\nEsun PLA\nFiberlogy HD-PLA\nFillamentum PLA\nFloreon3D\nHatchbox PLA\nPlasty Mladeč PLA\nPrimavalue PLA\nProto pasta Matte Fiber"
filament_settings_id =
fill_angle = 45
fill_density = 20%
fill_pattern = cubic
first_layer_acceleration = 1000
first_layer_bed_temperature = 55
first_layer_extrusion_width = 0.42
first_layer_height = 0.2
first_layer_speed = 70%
first_layer_temperature = 215
gap_fill_speed = 40
gcode_arcs = 0
gcode_comments = 0
gcode_flavor = reprap
infill_acceleration = 2000
infill_every_layers = 1
infill_extruder = 1
infill_extrusion_width = 0.45
infill_first = 0
infill_only_where_needed = 0
infill_overlap = 25%
infill_speed = 75
interface_shells = 0
layer_gcode =
layer_height = 0.15
max_fan_speed = 100
max_layer_height = 0.25
max_print_speed = 100
max_volumetric_extrusion_rate_slope_negative = 0
max_volumetric_extrusion_rate_slope_positive = 0
max_volumetric_speed = 0
min_fan_speed = 85
min_layer_height = 0.07
min_print_speed = 15
min_skirt_length = 4
notes =
nozzle_diameter = 0.4
octoprint_apikey =
octoprint_host =
only_retract_when_crossing_perimeters = 0
ooze_prevention = 0
output_filename_format = [input_filename_base].gcode
overhangs = 1
perimeter_acceleration = 800
perimeter_extruder = 1
perimeter_extrusion_width = 0.45
perimeter_speed = 40
perimeters = 3
post_process =
pressure_advance = 0
print_settings_id =
printer_settings_id =
raft_layers = 3
resolution = 0
retract_before_travel = 1
retract_layer_change = 1
retract_length = 0.8
retract_length_toolchange = 3
retract_lift = 0.5
retract_lift_above = 1
retract_lift_below = 199
retract_restart_extra = 0
retract_restart_extra_toolchange = 0
retract_speed = 35
seam_position = nearest
serial_port =
serial_speed = 250000
skirt_distance = 2
skirt_height = 1
skirts = 1
slowdown_below_layer_time = 25
small_perimeter_speed = 20
solid_infill_below_area = 0
solid_infill_every_layers = 0
solid_infill_extruder = 1
solid_infill_extrusion_width = 0.45
solid_infill_speed = 40
spiral_vase = 0
standby_temperature_delta = -5
start_gcode = M115 U3.0.10 ; tell printer latest fw version\nM83 ; extruder relative mode\nM104 S[first_layer_temperature] ; set extruder temp\nM140 S[first_layer_bed_temperature] ; set bed temp\nM190 S[first_layer_bed_temperature] ; wait for bed temp\nM109 S[first_layer_temperature] ; wait for extruder temp\nG28 W ; home all without mesh bed level\nG80 ; mesh bed leveling\nG1 Y-3.0 F1000.0 ; go outside pritn area\nG1 X60.0 E9.0 F1000.0 ; intro line\nG1 X100.0 E12.5 F1000.0 ; intro line
support_material = 1
support_material_angle = 0
support_material_buildplate_only = 0
support_material_contact_distance = 0.1
support_material_enforce_layers = 0
support_material_extruder = 1
support_material_extrusion_width = 0.35
support_material_interface_contact_loops = 0
support_material_interface_extruder = 1
support_material_interface_layers = 1
support_material_interface_spacing = 0.2
support_material_interface_speed = 100%
support_material_pattern = rectilinear
support_material_spacing = 2
support_material_speed = 50
support_material_synchronize_layers = 0
support_material_threshold = 35
support_material_with_sheath = 0
support_material_xy_spacing = 60%
temperature = 205
thin_walls = 0
threads = 4
toolchange_gcode =
top_infill_extrusion_width = 0.45
top_solid_infill_speed = 30
top_solid_layers = 9
travel_speed = 120
use_firmware_retraction = 0
use_relative_e_distances = 1
use_volumetric_e = 0
variable_layer_height = 1
wipe = 1
xy_size_compensation = 0
z_offset = 0

Thanks!