STEP 2 - Mounting your Molding into In-Corners
A) Start on the in-corner that is farthest away from the door(s). Take a 5-foot section of molding (you can take a left or right section). (Do NOT apply glue now!) Place the molding in the position to be installed, making sure the notch on the top of the molding is facing the ceiling, and the sides of the molding are flat up against the wall. Then, with a pencil, draw a line (making it light, but dark enough so that you can see it) about 1/4 inch in from the edge of the molding. (See figure 1). Make these marks about 1/2 inch long, going along
about every foot of the molding. These marks will be used as guides to help you when mounting the molding.
B) Starting about 1/2 inch inward, apply the glue in a straight line across the upper back and lower back sections of the molding. (See figure 2)
IMPORTANT NOTE: Some adhesives may not adhere as fast as others. For the adhesives that take a while to adhere, you may either 1.) Use large (around 3 inches in length) pins and place them every foot along the molding, or 2.) Put small amounts of hot glue (about a dime in size) on the top & bottom of the molding about every foot.
C) As soon as you are done applying the glue (making sure the notch on the top of the molding is facing the ceiling and the slanted edge is facing the in-corner of the wall,) mount the molding flat up against the wall. The molding’s back and top should be flat against the wall, and all the guides you made should be covered up by the molding. The edge of the slanted side of the molding should be touching the adjacent wall, but not squished nor away from the wall. (See figure 3) Once you have the molding in a good position, press along the length of the molding to the wall & ceiling to insure a strong bond.
D) For the other side, repeat Step 2, A thru C. (Figure 4). Continue this process for all in-corners where 5-foot 6-inch sections will fit. (NOTE1: Each in-corner section is 5 feet, so the extra 6 inches of space is for the next piece. NOTE2: If one side of the in-corner fits, but not the other, go ahead and install that one side)
STEP 3 - Mounting your Molding into Out-Corners
A) Like with the in-corners, make guides. (For details, go to Step 2, Part A). If a 3-foot out-corner section (left and/or right) fit the area, go ahead and continue with this Step (NOTE: Each out-corner section is 2 feet 6 inches, so the extra 6 inches space is for the next piece.) If they don’t fit, go to Step 4.
B) Glue the back of the molding. (Refer to Step 2, Part B for details).
C) As soon as you are done applying the glue (making sure the notch on the top of the molding is facing the ceiling and the slanted edge is facing the Out-Corner edge of the wall)(see figure 5). Mount the molding flat up against the wall. The molding’s back and top should be flat against the wall, and all the guides you made should be covered up by the molding. The back edge of the slanted side of the molding should be even with the end of the wall. (See figure 5)
D) If the other 2-foot 6-inch out-corner section fits the out corner with 6 inches or more remaining on the wall, go ahead and make guides. (See Step 2, part A for details) (NOTE: If the other molding does not fit, go to Step 4, Part A). Then apply glue to the slanted side of the molding that is already mounted. (See Figure 6) Next, glue the back of the 
other out-corner (For details, see Step 2, Part B) and mount on the wall, up against the other mounted out corner. If there is a gap or the molding is uneven, you can pinch, push and pull the foam to make the molding even. (Figure 7) (NOTE: Do not pinch, push or pull the molding too hard, it might tear, deform or stretch.)
STEP 4 - Cutting your Molding to Fit the Corners
A) Starting with the in-corners, select a wall where you haven’t put an in-corner section. (NOTE: After you are done with the in-corners, do the out corners with this step) Now there can only be two scenarios to how you need to cut & install the in-corner molding.
(1) The molding will overlap another molding. In this case, go to Step 4, Part B.
(2) The molding will come come close to an in or out corner of a wall. I
n this case, go to Step 4, Part D
B) Measure the gap from the mounted molding to the adjacent wall. (See Figure 8)
C) Then, make a mark on the BACK of the molding, starting from the slanted edge (if there is no slanted edge on the molding, you can measure from the straight edge) to the distance of the gap, adding about
1/8 inch at the end so that the molding doesn’t fall short (Figure 9). Then, draw a line with a straight edge down the back of the molding (See Figure 10). After you draw the line, use a sharp carving knife, and carve straight down, through the molding. (See figure 11). Now, you have a molding 
that will fit the gap perfectly. Continue by gluing the molding onto the wall (see Step 2, Part C for details)
D) Measure the length of the wall, from end to end, then subtract 6 inches from that distance. (The 6 inches will make room for the other end piece.) To cut & mount, repeat Step 4, Part C.
STEP 5 - Cutting your Molding to Fit the Center
The final step in mounting creating the center sections. Measure the distance of the gap (see figure 12). With the remaining pieces, or extra 5-foot sections (sold separately), repeat Step 4, Part C to cut & mount the molding. (NOTE1: Two or more remaining pieces may be needed to fill the gap. NOTE2: Sometimes, no cutting is needed to fill the center sections, so you can just measure (to make sure) and glue to mount your molding.)
STEP 6 - Brush Painting your Molding
A) Begin by mounting all of your crown moldings. To mount, do Steps 2 thru 5. Once all the moldings have been mounted, wait approximately 3 hours for the glue to dry. After 3 hours, evenly apply 2 coats of thinned drywall joint compound, letting each coat dry completely. (See Figure 13) (If necessary, you may
apply another coat to the molding. Also, if necessary, after the molding has completely dried, you may sand it down gently. A minimum 2,000 grit ultra-fine sandpaper is suggested.)
B) When the molding has 
completely dried, evenly apply one coat of primer to it. Let the molding dry completely. (See Figure 14)
C) When molding has completely dried, finish by evenly brushing any color of latex paint, stain, wood finish, or sponge paint you want to use.
STEP 7 - Spray Painting your Molding
Spray paint all of your moldings with even coats of paint, applying as many coats as necessary. (NOTE: Be careful not to over saturate any of the coats - thinner coats are better!) Once you are done spray painting your molding, wait until the moldings have completely dried before mounting. To mount, do Steps 2 thru 5.
