1969 Ski-Doo Snowmobiles Service Manual, Page 116Get this manual
4Before using the fiberglass resin, add hardener or catalyst in ratio of drops of catalyst for each ounce of resinThen mix thoroughly 5Set these layers of fiberglass one on top of the other and coat them with fiberglass resin, using paint brush as shown on Figure 16Apply this resin coated mat on the back of the area to be repairedSee Figure 2