<SUBMISSION>
<ACCESSION-NUMBER>0001140361-11-020391
<TYPE>4
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<PERIOD>20110331
<FILING-DATE>20110404
<DATE-OF-FILING-DATE-CHANGE>20110404
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>AMERON INTERNATIONAL CORP
<CIK>0000790730
<ASSIGNED-SIC>3270
<IRS-NUMBER>770100596
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1130
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>245 S LOS ROBLES AVE
<CITY>PASADENA
<STATE>CA
<ZIP>91101
<PHONE>6266834000
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<STREET1>245 S LOS ROBLES AVE
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<STATE>CA
<ZIP>91101
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<DATE-CHANGED>19920703
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<CONFORMED-NAME>PEPPERCORN JOHN E
<CIK>0001188824
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<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-09102
<FILM-NUMBER>11735354
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<MAIL-ADDRESS>
<STREET1>245 SO. LOS ROBLES AVE 626-683-4000
<CITY>PASADENA
<STATE>CA
<ZIP>91101
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
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    <periodOfReport>2011-03-31</periodOfReport>

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        <issuerName>AMERON INTERNATIONAL CORP</issuerName>
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            <rptOwnerName>PEPPERCORN JOHN E</rptOwnerName>
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            <rptOwnerStreet1>245 SO. LOS ROBLES AVE.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PASADENA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>91101</rptOwnerZipCode>
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            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
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            <otherText></otherText>
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            <securityTitle>
                <value>Common Stock</value>
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            <transactionDate>
                <value>2011-03-31</value>
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            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1200</value>
                    <footnoteId id="F1"/>
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                <transactionPricePerShare>
                    <value>0</value>
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                <transactionAcquiredDisposedCode>
                    <value>A</value>
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            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15400</value>
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                    <value>D</value>
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    <footnotes>
        <footnote id="F1">Restricted shares vesting in three equal annual installments beginning on March 31, 2012.</footnote>
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    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Cynthia A. Iwasaki, Power of Attorney</signatureName>
        <signatureDate>2011-04-04</signatureDate>
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<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
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<DESCRIPTION>POWER OF ATTORNEY
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">POWER OF ATTORNEY</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font>Know all by these presents, that the undersigned hereby constitutes and appoints each of Cynthia A. Iwasaki and Leonard J. McGill, signing singly, his true and lawful attorney-in-fact to:</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(1)</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">execute for and on behalf of the undersigned Forms 3, 4 or 5 and in accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder;</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(3)</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in his discretion.</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font>The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform all and every act and thing whatsoever requisite, necessary and proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as such attorney-in-fact might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or his substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted.&#160;&#160;The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is Ameron International Corporation a Delaware corporation, (the &#8220;Company&#8221;) assuming, any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4, and 5 with respect to the undersigned&#8217;s holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font>IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 7<font style="DISPLAY: inline; FONT-SIZE: 70%; VERTICAL-ALIGN: text-top">th</font> day of June 2010.</font></div>

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