I have an 84 El Camino with surface rust in few spots and want to get it all cleaned up. Here is my question: I sand and sand and sand and when I get all of the loose rust off there is what appears to be little black pits in the metal that are nearly impossible to get rid of. Do I need these areas to be entirely rust/pit free before continuing? How do I go about getting rid of these? Secondly, these tough spots tend to be concentrated around the upper area of the bed where they are hidden by the chrome and thusly the area is shaped like an "L" and hard to get sanding equipment into. Any tips?
shakin off the rust.
- Thread starter PPhem
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Sand down as far as you can go and maybe grind it a little, and put a thin layer of fiberglass which will fill the holes and prevent them from rusting. Then put a layer of bondo over the fiberglass because you cant paint over it. Thats what i did on my regal anyway
To get the pits clean, you will need to etch it with an acidic solution, like Naval Jelly.Cover it with some plastic wrap while it is working so that it doesn't dry out.
Eastwoods Sells a spray on metal prep that is supposed to etch out what ever rust is in those small pits.
If there is any hint of rust still there use a product called ospho.
http://www.ospho.com/directions.htm
RUSTED METALS - OSPHO is a rust-inhibiting coating - NOT A PAINT You do not have to remove tight rust. Merely remove loose paint and rust scale, dirt, oil, grease and other accumulations with a wire brush - apply a coat of OSPHO as it comes in the container - let dry overnight, then apply whatever paint system you desire. When applied to rusted surfaces, OSPHO causes iron oxide (rust) to chemically change to iron phosphate - an inert, hard substance that turns the metal black. Where rust is exceedingly heavy, two coats of OSPHO may be necessary to thoroughly penetrate and blacken the surface to be painted. A dry, powdery, grayish-white surface usually develops; this is normal - brush off any loose powder before paint application.
http://www.ospho.com/directions.htm
RUSTED METALS - OSPHO is a rust-inhibiting coating - NOT A PAINT You do not have to remove tight rust. Merely remove loose paint and rust scale, dirt, oil, grease and other accumulations with a wire brush - apply a coat of OSPHO as it comes in the container - let dry overnight, then apply whatever paint system you desire. When applied to rusted surfaces, OSPHO causes iron oxide (rust) to chemically change to iron phosphate - an inert, hard substance that turns the metal black. Where rust is exceedingly heavy, two coats of OSPHO may be necessary to thoroughly penetrate and blacken the surface to be painted. A dry, powdery, grayish-white surface usually develops; this is normal - brush off any loose powder before paint application.
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