Danny D.:
If you ever have to do that work again, then don't bother with paint; just use white 2 inch wide lane marking tape.
Lane marking tape has a very strong adhesive, which is also water proof. Also, lane marking tape itself is very strong because people walk on it, and they use floor cleaning machines over the tape without it coming off. And, it comes in various colours and various widths.
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For example, with the rack shown in this photo:
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I'd just cut a piece of 2 inch wide white lane marking tape, and fold it over the edge of the rack so that the tape is 7/8 inches wide along the edge of the rack and the adhesive surfaces stick to each other between the tynes of the rack.
PS1:
Someone mentioned MEK earlier.
MEK and acetone are both "Ketones". A ketone is anything with the following structure...
A | C=O | B
Where A and B can be anything and C and O are Carbon and Oxygen atoms respectively, with a double bond between them.
If both A and B are methyl groups (-CH3), then it's called "dimethyl ketone", or "acetone" for short.
If A is a methyl group (-CH3) and B is an ethyl group (-CH2-CH3), then it's called "methyl ethyl ketone", or "MEK" for short. Or, if you're stoned, if A is the ethyl group and B is the methyl group, it's still MEK.
So, acetone (which is nail polish remover) and MEK are chemical siblings. MEK is acetone's big brother.
PS2:
Both carbon and silicon both form 4 covalent bonds. So, methane has a chemical formula of CH4 cuz the carbon atom forms a covalent bond with each of 4 hydrogen atoms.
Silicone also forms 4 covalent bonds, just like carbon, so chemists wanted to know what they'd get if they used silicon instead of carbon to make plastics.
The first successful plastic made from silicon was the silicon rubber that we still use today as silicone caulk. Chemists noticed that the number of oxygen atoms and the number of silicon atoms in the new plastic were equal, and so there was some speculation that the structure of the new plastic was that of a long ketone; like this:
| Si=O | Si=O | Si=O |
So, they combined the words "silicon" and "ketone" to name the new plastic "silicone". That's why it's Silicon Valley, but it's silicon_e_ caulk.
Well, it turns out they got the structure of silicone rubber all wrong. It turns out the real structure of silicone rubber is:
.......| .......O .......| H3C-Si-CH3 .......| .......O .......| H3C-Si-CH3 .......| .......O .......| H3C-Si-CH3 .......|
(pardon the periods)
Basically, it's a -Si-O-Si-O-Si-O-Si-O-Si-O-Si-O backbone with two methyl groups bonded to each silicon atom.
So, since it didn't look like a ketone after all, chemists quickly renamed the plastic "di methyl siloxane", but everyone still calls it "silicone" cuz the original name stuck. So, if you see anything with the word "siloxane" in it's name, it means it's a silicon based plastic.
Dow Corning has a section on it's web site explaining the chemistry and properties of silicones, or more correctly, siloxanes: 'Fascinating Silicones - Dow Corning'
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