Here are two fast, simple tests you can perform on samples of your finish.
While these two tests will not reveal every potential problem, they will help you catch a couple of the biggies. Make sure that the samples are completely
dry before testing. I would allow 24 hours.
With a sharp razor blade, cut a series of slashes thru the finish about
1/16 apart. Do this in a cross hatch pattern across an area about 3/4 x 3/4 wide. Now, apply a piece of fresh masking tape across this area. Make the
tape large enough so that it overlaps the slit area. Rub the tape onto the crosshatch with your fingernail. Finally, grab an end of the tape and pull up
sharply. Try this couple of times; maybe vary your spacing of the slits a little. Nothing more than an occasional random speck of finish should be sticking
to the back of your tape, otherwise there could be an adhesion problem.
Gently tap your sample a couple of times with the face of a hammer. You dont
have to hit real hard, barely a dent. Look at the area. Does the dent look milky in color, or maybe the finish crumbled or spider webbed? If it looks like
anything other than dented wood, you are probably looking at adhesion/ film thickness problems.
Never attempt this test on an actual toddler!!!