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<blockquote data-quote="russ010" data-source="post: 179525" data-attributes="member: 677"><p>You can use etching primer over paint that is already there... all you need to do is scratch up the surface so that the primer has something to ETCH to... etching primer is made to react with the aluminum so that it basically eats it way into it. </p><p></p><p>I used zinc chromate.. if you can find it, it's pretty cheap and there is nothing you need to add to it. I applied it with a regular paint brush, but you better get 2 brushes for the whole boat. That is some sticky stuff, and the longer you go, the thicker your brush gets to where it's almost like your trying to use a brick to put paint on.</p><p></p><p>When you get through with the etching primer, do a light wet sand with 800-1200 grit sandpaper to get rid of the runs or any imperfections like brush streaks. If you don't do this, you'll be able to see it on your final coat. </p><p></p><p>When you put your final coats on, do as many light coats as possible, and wetsand between each coat after it dries.</p><p></p><p>I painted my last boat about 3 years ago, and it still looks like it was painted yesterday. The prep work (sanding, primer) is what is going to make your final coats look the best and last that much longer.</p></blockquote><p></p>
[QUOTE="russ010, post: 179525, member: 677"] You can use etching primer over paint that is already there... all you need to do is scratch up the surface so that the primer has something to ETCH to... etching primer is made to react with the aluminum so that it basically eats it way into it. I used zinc chromate.. if you can find it, it's pretty cheap and there is nothing you need to add to it. I applied it with a regular paint brush, but you better get 2 brushes for the whole boat. That is some sticky stuff, and the longer you go, the thicker your brush gets to where it's almost like your trying to use a brick to put paint on. When you get through with the etching primer, do a light wet sand with 800-1200 grit sandpaper to get rid of the runs or any imperfections like brush streaks. If you don't do this, you'll be able to see it on your final coat. When you put your final coats on, do as many light coats as possible, and wetsand between each coat after it dries. I painted my last boat about 3 years ago, and it still looks like it was painted yesterday. The prep work (sanding, primer) is what is going to make your final coats look the best and last that much longer. [/QUOTE]
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