rust removal and prevention.
Posted: Tue Jan 04, 2011 7:15 pm
I have found this to work with mixed success. first clean area removing all dirt, grease, oil and loose flaking rust and paint as well and for small distance out around the repair as well as rust will continue under the edge of the good paint. treat rust with a good rust converter most are phosphoric acid based they change rust iron oxide FeO2 to iron phosphate FePO4 a beneficial form of iron follow the directions on the container let dry clean area with wax and grease remover or thinners and prime with primer surfacer let dry wet sand with 320 or 400 wet and dry blow dry with air them leave to dry out properly apply filler if needed sand smooth (note its best to leave bog to dry for two days so it shrinks properly before you sand it) prime again sand with 400 wet and dry repeat filling/priming if needed. repair is now ready for top coat it is best to do a full panel i.e. a door or a guard. sand with 1200 wet and dry then clear coat if desired then when dry fully leave takes a day or two wash car with normal car wash then buff with a buffing compound such as Mr buff to shine.
note: 3 coats to a full colour and several light coats are better than one heavy coat.
that's removal taken care of now prevention
shell make a product called ensis fluid that is good for coating metal parts to prevent rust perfect for crankshafts blocks heads etc while they are being stored clean the parts then coat them and they wont rust we coated machinery that had been outside for twenty years or more and it was still out side 5 years later it hadn't rusted any more than it already was.
electronic rust preventer's (reverse electrolysis)
some people swear by them some say they don't work but I have found they stop rust getting any worse a friend of mine had rust bubbles coming out in his car he put one on and they didn't get any worse nor did any more form.
zinc anodes bolted on too the car body have to touch bare metal to work as far as I know you can the seal around them but they have to be bare in one place to be able to work as they are eaten away instead of your car or boat or what ever they are attached to.
there are several product for use in cars such as tectl 506 and others use inside door etc.
for an under body coating mix brush-able ormanoid with turps and spray on with an engine cleaning gun thin only enough that the gun will pick it up. ormaniod sticks better a lot of the others contain sawdust and they peel and fall off ormanoid wont also the heavier you put it on the more it will want to fall off clean off all dirt, oil and grease before or it wont stick no matter what you use.
note: 3 coats to a full colour and several light coats are better than one heavy coat.
that's removal taken care of now prevention
shell make a product called ensis fluid that is good for coating metal parts to prevent rust perfect for crankshafts blocks heads etc while they are being stored clean the parts then coat them and they wont rust we coated machinery that had been outside for twenty years or more and it was still out side 5 years later it hadn't rusted any more than it already was.
electronic rust preventer's (reverse electrolysis)
some people swear by them some say they don't work but I have found they stop rust getting any worse a friend of mine had rust bubbles coming out in his car he put one on and they didn't get any worse nor did any more form.
zinc anodes bolted on too the car body have to touch bare metal to work as far as I know you can the seal around them but they have to be bare in one place to be able to work as they are eaten away instead of your car or boat or what ever they are attached to.
there are several product for use in cars such as tectl 506 and others use inside door etc.
for an under body coating mix brush-able ormanoid with turps and spray on with an engine cleaning gun thin only enough that the gun will pick it up. ormaniod sticks better a lot of the others contain sawdust and they peel and fall off ormanoid wont also the heavier you put it on the more it will want to fall off clean off all dirt, oil and grease before or it wont stick no matter what you use.