Columbia Coronado 25 Owenrs Manual page 112

6.4 (continued)
4. Cover with paper any areas that may possibly be exposed
to overspray.
5. Clean the area thoroughly with a white cloth saturated
with acetone to remove all dust or debris.
C. Preparing the Gel Coat and Spray Equipment
1. Thin the gel coat approximately 25 percent with acetone to
get sprayable consistency. Do not thin more than 50 percent;
otherwise the acetone will dull the finish.
2. Adjust the air pressure to between 30 and 90 pounds.
3. Add the exact amount of catalyst recommended by the gel coat
manufacturer. Mix thoroughly to avoid uneven cure.
4. Test spray gun on a piece of cardboard and
adjust pattern control and trigger to regulate
pattern. The two should be balanced. The smaller
area to be sprayed, the more the pattern and
trigger nozzles should be closed.
D. Applying Gel Coat
1. Position surface and/or lights so that you can see the spray
pattern as it forms on the surface.
2. Spray gel coat on the area. Spray uniformly
to avoid producing light and heavy areas. Apply
10 to 15 mils of gel coat -- approximately 5 mils
per pass - to allow proper flow and thus minimize
"orange peel" and to produce sufficient buildup
for final sanding and buffing.
CAUTION: MOVE GUN SLOWLY OR GEL COAT WILL RICOCHET OFF THE SURFACE.
3. Spray a very light film of polyvinyl alcohol (PVA) over the
gel coat immediately. This film seals off the air and
speeds up the cure to a non-tacky surface that can be
sanded. It also protects the finish from dust.
SECTION 6
Page 32