Model answer: Cresting practice and final finish weight check
The worked solution #
Part A — Cresting #
A1 — Color scheme and placement (example) #
Base color: Deep green (Liquitex Sap Green acrylic)
Accent color: Gold (Liquitex Iridescent Gold acrylic)
Separator lines: Black (Liquitex Carbon Black acrylic)
Base band: 5.5 to 7.0 inches from nock valley (1.5 inches wide)
Accent band: 7.0 to 7.375 inches (3/8 inch wide)
Separator lines at: 5.5 in, 7.0 in, 7.375 in from nock valley
This puts the base band roughly 1/2 inch above where the cock feather of a 5-inch fletching will be glued, leaving clearance so the crest does not extend under the fletching adhesive zone. Adjust start position by your actual feather length.
Why this color choice works for batch identification: Green-and-gold is visually distinct from the natural wood tone of an uncrested arrow and from the most common range colors (red, blue). At 20 yards, you can distinguish your arrows from a neighbor’s before walking to the target. The black separator lines add visual snap and make the boundary between base and accent clear from a distance.
A2 — Base band application #
The base band at 1.5 inches is wide enough to apply with 2–3 slow rotations of the shaft in the jig. Load the brush fully, position it at the far edge of the band, and rotate — do not move the brush toward the center until that edge line is clean. Then slide the brush to cover the full width.
Edge quality: A clean edge on the leading side of the base band (the side closest to the nock) matters most, because that is the side facing you when you pick the arrow off the target. The trailing edge (toward the fletching zone) will be covered by the topcoat and the fletching clamp anyway.
If the first base coat is patchy: Acrylic over a lacquer or shellac base can bead slightly if the sealer was applied very recently or if there is any surface contamination. Let the first base coat dry completely, then apply a second base coat — two thin coats are always better than one thick one.
A3 — Accent band #
3/8 inch is a narrow band — about the width of your thumbnail. The trick is to position the brush at the edge of the (fully dry) base band, load it with a consistent amount of paint (not dripping), and rotate once slowly. If you need a second rotation, you can do it before the first rotation’s paint has started to set — the wet-on-wet merge will be invisible.
If the accent color bled: The cause is always the same — the base color was not touch-dry. At 68°F with acrylic paint, touch-dry is 20–30 minutes. In a cold workshop (below 60°F), add 50% to all dry times. The fix after bleeding: wait for full cure (2 hours), sand the bleed zone with 400-grit on a small block, wipe clean, and re-apply the accent band. Do not try to paint over the bleed while it is still wet — you will spread it further.
A4 — Separator lines #
A size-0 liner brush loaded with black acrylic produces a clean 1/16-inch line when held still against a rotating shaft. The key technique: let the tip of the brush trail slightly rather than pressing it against the shaft — trailing produces a thinner, more consistent line than pressing.
Three separator lines: one at the nock-side edge of the base band, one at the junction of base and accent, one at the point-side edge of the accent band. Three lines frame the two bands cleanly and read as “finished” from across the range.
A5 — Topcoat #
One light pass of spray lacquer (Deft Clear Wood Finish, Krylon Crystal Clear, or similar) from 10–12 inches, rotating the shaft slowly during application. A single light pass is enough. The topcoat is dry to handle in 30 minutes and fully cured in 2 hours.
Why spray for the crest zone: A brush coat over acrylic paint risks re-wetting the paint surface (if using a water-based topcoat) or lifting it (if the brush is loaded too heavily with solvent-based topcoat). A spray from a distance deposits a finer film that does not mechanically disturb the paint surface. For the dip tube coats on the shaft body, brushing or spraying would both be fine — but at the crest, spray is gentler.
Part B — Weight check and GPP calculation #
B1 — Typical finish weight added #
For 11/32" Port Orford cedar at 28-inch length with two coats of gasket lacquer or shellac in a consistent dip tube:
Mean added finish weight: 7–10 grains per shaft
Expected range across batch: 4–14 grains (wider if any shaft had drip runs or thin spots)
A well-controlled batch: 5–12 grains, range ≤ 5 grains
A practical weight log for a clean batch:
Shaft | Bare (gr) | Sealed (gr) | Added (gr)
------+-----------+-------------+-----------
1 | 291 | 300 | 9
2 | 285 | 293 | 8
3 | 298 | 307 | 9
4 | 279 | 287 | 8
...
24 | 293 | 302 | 9
Mean added: 8.7 grains
Range: 7–11 grains
This is a realistic result from a careful dip operation. If your range is wider, identify whether the heavy shafts have visible runs (they do) or whether the light shafts have visible thin patches. Both are correctible before module 4.
B2 — GPP calculation (worked example) #
Using the matched-set specs:
Draw weight: 40 lb
100-grain field point: 100 grains
Nock insert (standard plastic, e.g., Easton or Bohning): 10 grains
3× shield-cut left-wing turkey feathers (5 inch): 20 grains (estimate)
Example — shaft #1 after sealing:
Sealed shaft: 300 grains
+ Field point: 100 grains
+ Nock: 10 grains
+ Fletching: 20 grains
= 430 grains total
GPP = 430 ÷ 40 = 10.75 GPP
10.75 GPP is above the 6.5–8.0 “midweight” target from most general guides — but that target was written for light carbon arrows, not cedar. For Port Orford cedar at 11/32", a finished arrow weight of 420–480 grains with 100-grain points is completely normal and shoots beautifully from a 40 lb traditional bow. The bow is not stressed, the trajectory is manageable at typical target distances (10–30 yards), and the arrows hit with satisfying authority.
Why the 6.5–8 GPP target seems to be missed: The GPP guideline was developed primarily for hunting setups where lighter, faster arrows matter for trajectory at longer distances. For target shooting at typical indoor/outdoor target distances (up to 30 yards), heavier arrows fly slower but group tightly — cedar is deliberately a heavier material. Do not reduce point weight or switch to shorter shafts to chase the 8 GPP ceiling unless you have a specific reason (e.g., the bow is noticeably noisy or the arrows key-hole at distance).
B3 — Outlier handling #
Shaft above batch mean by more than 8 grains: Inspect for drip runs by rolling the shaft slowly between your fingers in good light. A run feels like a slight ridge. If found, sand with 320-grit over the run, wipe with denatured alcohol, and spot-coat with a brush. Re-weigh after cure.
Shaft below batch mean by more than 8 grains: Hold it to a light source and look for thin spots — a thin area looks lighter in color (less finish, more wood visible). If found, spot-coat the thin area with a brush, feathering the edges so the patch is not visible. Re-weigh after cure.
All shafts within 5 grains of each other: No action needed. Proceed to module 4.
Why these choices #
Using acrylic craft paint rather than lacquer-based cresting paint: Both work. Lacquer-based cresting paint (Bohning’s Cresting Paint, True Flight) dries faster (5 minutes to touch vs. 20–30 for acrylic) and gives a harder finish that resists the fletching clamp contact better. But acrylic is available at any craft store, comes in a wider color range, and cleans up with water — much more practical for a first cresting attempt. Once you have the technique down, switching to lacquer-based paint is a straightforward upgrade for the next batch.
Why the GPP calculation uses estimated feather weight now, not actual: The feathers are not on the arrows yet. The purpose of the Part B calculation is to establish a pre-fletching baseline and flag obvious weight outliers before module 4 adds more complexity. You will refine the GPP calculation in module 4 once actual fletched weights are available. The estimate (20 grains for three 5-inch shield-cut feathers) is close enough to make the outlier check meaningful.
Common pitfalls #
1. Starting cresting before the dip coats are fully cured. Crest paint applied to a soft or partially cured sealer surface will bond to the sealer rather than to the sealer’s top surface — when the sealer continues to cure and harden underneath, it can release the paint layer and cause the crest to peel. “Full cure” on the label is the right threshold, not “dry to touch.”
2. Applying the topcoat immediately after the last crest band. The separator lines are the last thing applied and the thinnest — they need the full touch-dry time before the topcoat goes on. The topcoat brush (or spray) can re-wet thin acrylic lines and smear them. A minimum of 2 hours between the last crest color and the topcoat is conservative but safe.
3. Skipping the finish weight log because the GPP will “obviously be in range.” The weight log serves two purposes beyond GPP: it documents the finish weight added per shaft (useful for diagnosing any flight inconsistency after module 4), and it identifies the few shafts in the batch that are outliers before they are fully built up with fletching and hardware. Catching a heavy shaft before fletching is much easier than chasing a grouping outlier on the range.