When using HI-FLOAT in clear or transparent balloons, some uneven runs of liquid may be visible initially. These will gradually disappear as the coating dries.
Splatter can be minimized in a number of ways. Try inflating the balloon more slowly, with the helium nozzle pointed in a downward direction. Also, when rubbing the balloon to spread the coating, rub gently to avoid working bubbles into the liquid.
If the HI-FLOAT is very old and has begun to get thick and stringy, it will be more visible inside the balloon. This gel can be redissolved by heating.