Application Of Acrylics; Randacryl Method - Piper Dakota Maintenance Manual

3. Mix intermediate epoxy primer to manufacturer's directions. Thin 20-30% by volume with MX- l5
thinner. Air dry 4-6 hours at 75° F or force dry 2-3 hours at l 25° F before top coating with Jet-Glo.
4. Tack wipe surface before applying topcoat.
5. Mix Ameron Jet-Glo polyurethane enamel to manufacturer's directions. Reduce with 110 655 thinner
to a viscosity of 17-20 seconds using a No. 2 Zahn Cup at 75° F.
6. Apply Jet-Glo to a spreading rate of approximately 300 sq. ft/gal to attain a 2.0 mil dry film thickness.
A recommended pot pressure of 10-13 psi and an atomizing air pressure of 50-60 psi are suggested as
a starting point. Best results are obtained with a three coat application consisting of a tack coat,
followed by a medium wet coat and a full finish coat.
7. Allow Jet-Glo to air dry 12-14 hours at 75-80 o F or force dry 4-6 hours at 125°F to obtain a tape free
condition.
Ameron Accelerator 110-975 using a level of 1/2 oz. per 1/2
gallon of color (mixed) will air dry stripes in appronmately 2
hours. This will allow doublc-striping the same day.

APPLICATION OF ACRYLICS

l.

Randacryl Method.

a. For applying Randacryl to enamel finished surfaces, first strip all enamel finish from surface with
Rand-O-StripB- 5000. Apply one thin, wet coat of Randolph Wash Primer, Epibond or Rand-O-
Plate Primer. Allow to dry overnight.
b. For applying Randacryl to acrylic finished surfaces, first rub surface with clean dry Kraft Paper
(first making sure that the surface is thoroughly cleaned).
c. Tack rag, then apply three coats of properly thinned Randacryl allowing one-half hour drying time
between coats. The gloss of the final coat can be improved by adding Y-9910 Universal Retarder
(in the proportion of 1/4 of the thinner used).
d. Allow an overnight drying period before applying trim or letters if retarder has been used. Remove
tape as soon as trim or letters have been applied.
e. To touch up a small area, first wash area thoroughly. Remove all wax, grease, and dirt. Sand area
lightly and apply a coat of zinc chromate primer to bare metal.
When coating over an unknown finish with Randacryl, test paint
a small area before proceeding.
f. Repeat steps b, c, and d.
Randacryl is not intended for use on fabric or directly over
enamels. Rand-O-Plate and Epibond have been used as a sealer
coat over aged "air dry" enamel surfaces prior to coating with
Randacryl. This procedure quite often satisfies touch-ups for
small sections.
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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Reissued: August 1, 1986