cleaning with any of these items, away from anything that would
be harmed by bleach or other chemicals. Wear heavy rubber gloves
to protect your hands and follow all instructions on the packaging
of the product. If you use any other cleaner besides the Starbrite
Power Cable Cleaner, it may be a good idea to give it a final cleaning with this product to take advantage of the protective polymer
coating it gives.
I need to install a new windshield on the command bridge
of a 28-foot Bayliner. How can I drill holes in the new Plexiglas
windshield without breaking it? — Stan Mack
Don Casey: You’ll need bits intended specifically for drilling
plastic. These have a shallower point angle, typically 90 degrees.
Regular twist drills generally have a 118-degree point angle, which
cuts faster but risks chipping and even cracking plastic. I say
“bits”, plural, because it will also be essential to drill pilot holes,
then enlarge them. This is necessary for two reasons. First, you
need to be deadly accurate with the location of the holes. If you are
a little off with a hole in wood, the fastener shoulders itself left or
right to fit, crushing the wood on one side of the drilled hole. With
plastic, if the fastener is not in the center of the hole but pressed
hard against one side, the plastic will not compress and cracking is
likely. So you must mark the centers of the holes accurately, then
drill a small pilot hole centered exactly on each center mark.
You can drill the hole to size with your second drill bit, but
enlarging the holes in steps, perhaps 1/16-inch larger with each
pass, will both help to keep your hole from relocating slightly to
one side and reduce the risk of chipping. If the acrylic is thick,
spritzing a little water on the bit and into the pilot hole will both
lubricate the bit and cool the plastic to prevent melting and bind-
ing. Be sure to have solid backing beneath the hole location so the
exiting bit drills through rather than breaks through the bottom.
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