any auto painters should etch primer be able to be rubbed of?

[cxcxcxvcvcvc]

ok might sound dumb but i dont know much about paints/primer ect and cant afford to get it done professionally!
Im doing up a valiant charger and ive just taken the cracked paint off the roof and put deoxidiser on and then hit it with 50/50 etch primer (mix ratio was on the can) but the primer can be rubbed off with a bit of effort with metho spirits is this supposed to be able to happen? (probably not) also it says on the can when appling as an etch primer spray a light mist on the panels will it be a problem if i overspray? any help would be great!

[R0d]

etch primers just to make the bare metal sticky (so filling primer can stick better), anything from cans can be rubbed off with metho, but you should be able to put some putty primer straight other the etch or be lazy like me and just spray other the etch primer i only did this on my wheels tho wouldnt do it other the whole car

[Noy]

I would of used hi-fill primer as its more thick but etch will be fine, just mask the car up and do it.. from the line of the roof down "paper" and over spray shouldnt be a problem.

Sand the etch primer back with 400 wet untill its smooth than apply your paint. But thinners will remove overspray, just be quick with it because it can damage paint.

2 nice coats of primer is fine aswell.

goodluck

[AirStrike]

Etch primer should not be able to we wiped off easily. What time did you leave between the rust converter and the primer? Also I know you followed the instructions on the can, but a 50/50 mix is a little thin for my liking.

[Noy]

Yeah and air strike is right, 50/50 is very thin way to much thinners thats why its coming off easily. Etch is 2:1, hi-Fill is 3:1.

2part etch , 1 part activator normally 10% depending on how much primer

[AirStrike]

Yeah and air strike is right, 50/50 is very thin way to much thinners thats why its coming off easily. Etch is 2:1, hi-Fill is 3:1.

2part etch , 1 part activator normally 10% depending on how much primer

Yeah that's a more acceptable ratio. The thinners would make it evaporate too quick and stop it from binding to the substrate correctly.

[Gus The Snail]

usually etch primer is an epoxy , it shouldnt require thinning down ( some do but depends on the brand )

Steer clear of hi-fill primers , these shrink over time ( causing paint to crack , or get "shrinkback" )

DO NOT sand etch primer back , it is designed to adhere to bare metal and give you a surface for undercoat and filler to attach to ( altho filler can attach to almost anything ).

The thing to do if you have bare metal is , Etch , Primer , filler ( bog ) undercoat , spot putty ( for all minor dents , paint cho]ips etc ) undercoat again , guide coat , then rub the guide coat off with a block , fix any imperfactions (speeling Hehehehhee ) then undercoat and final rub , then paint.

Everybody is different , which brings mixed results.. I have 15 years in auto body work and paint , but its up to you how you want to go about it.. its all a learning curve , and making mistakes etc , gives you better knowledge for in the future.

[cxcxcxvcvcvc]

Etch primer should not be able to we wiped off easily. What time did you leave between the rust converter and the primer? Also I know you followed the instructions on the can, but a 50/50 mix is a little thin for my liking.

i left it for 20mins as per deoxidiser instructions

Yeah and air strike is right, 50/50 is very thin way to much thinners thats why its coming off easily. Etch is 2:1, hi-Fill is 3:1.

2part etch , 1 part activator normally 10% depending on how much primer

so do you mean say 1 cup thinners to 2 cups primer?

usually etch primer is an epoxy , it shouldnt require thinning down ( some do but depends on the brand )

Steer clear of hi-fill primers , these shrink over time ( causing paint to crack , or get "shrinkback" )

DO NOT sand etch primer back , it is designed to adhere to bare metal and give you a surface for undercoat and filler to attach to ( altho filler can attach to almost anything ).

The thing to do if you have bare metal is , Etch , Primer , filler ( bog ) undercoat , spot putty ( for all minor dents , paint cho]ips etc ) undercoat again , guide coat , then rub the guide coat off with a block , fix any imperfactions (speeling Hehehehhee ) then undercoat and final rub , then paint.

Everybody is different , which brings mixed results.. I have 15 years in auto body work and paint , but its up to you how you want to go about it.. its all a learning curve , and making mistakes etc , gives you better knowledge for in the future.

but it should be alright to sand back the over spray though?
also thanks everybody for the help!

[Noy]

Yeah with etch and hi-fill sometimes at work we dont thin it down, and just add hardner to the hi-fill. But like gus said, every shop/boss has its own ways of doing things.

[cxcxcxvcvcvc]

heres a few before the primer went on you can see how the metal has turned a blue colour from the deoxidiser also in the above pics there seems to be alot of dust but thats on the dry primer and the spots are surface rust! i took all the paint off with p80 and smothed it with 120.

[cxcxcxvcvcvc]

Yeah with etch and hi-fill sometimes at work we dont thin it down, and just add hardner to the hi-fill. But like gus said, every shop/boss has its own ways of doing things.

do these pics kind of look like the jobs been done ok? i know its hard to tell!

[Noy]

This is the best way I could explain 2:1 man, so no dont measure by the "cup" full.

[cxcxcxvcvcvc]

This is the best way I could explain 2:1 man, so no dont measure by the "cup" full.

so 80% primer and 20%thiners or say 3/4 cup prime and 1/4 cup thinners?

[R0d]

get a measuring cup that has mixing ratios on it man, or can do it roughly by wieght, eg every 50 grams of primer put 25 grams of hardener (primer weighs more than hardener tho)and then a bit of thinners, thinners is just to get the stuff out the gun easier but make sure theres not to much or it will run

[cxcxcxvcvcvc]

get a measuring cup that has mixing ratios on it man, or can do it roughly by wieght, eg every 50 grams of primer put 25 grams of hardener (primer weighs more than hardener tho)and then a bit of thinners, thinners is just to get the stuff out the gun easier but make sure theres not to much or it will run

hey whats the hardener your talking about? on the can it just says etch primer with super glow (im assuming thats thinners?) also the car isnt going any where any time soon is it ok to leave it under my house with just the etch over the top? i know im asking alot of questions but i dont want to go to all the trouble only to have the paint job stuffed

[cxcxcxvcvcvc]

went down and had a look at it (the paint job) this morning and it looks and feels alot more stable now do i do the wet and dry with the 400?

[Noy]

Thats what we would do at work, but dont sand the primer to far back.. you just have to knock the top off it so its smooth. And yes use 400 wet and dry!

[R0d]

went down and had a look at it (the paint job) this morning and it looks and feels alot more stable now do i do the wet and dry with the 400?

different companies use different primers, so if it worked i wouldn't worry about it, good to hear it finally dried

[cxcxcxvcvcvc]

cheers to everyone who has given advice im sure i will need more advice down the track also the wet rub wont worry the pannel under neath will it? i meant useing water to do the rub wont cause the pannel to rust will it?

[Rhino Racing]

Hey mate are you going to make a new thread about the almighty charger???
Because the old one got scrapped when the new server etc happened.
Have been looking forward to updates on the car.
Post up a new one with th eoriginal pics of the car and we can watch its progress.
Keep up the good work.
Catchya!

[cxcxcxvcvcvc]

Hey mate are you going to make a new thread about the almighty charger???
Because the old one got scrapped when the new server etc happened.
Have been looking forward to updates on the car.
Post up a new one with th eoriginal pics of the car and we can watch its progress.
Keep up the good work.
Catchya!

will do mate
actaully i need some help on the internals of the panels! there is rust on the inside of the c pillars and inside some of the body work can anyone give me some advice on how to get rid of it as i cannot reach it with a wire brush or anything? the only idea i have is that i was told a trick by a guy who does valiant restorations, he said to get a peice of garden hose about a metre long and plug up one of the ends with a bolt/ball bearing! then drill very small holes though the end of the hose, & fill the hose with fish oil or rust converter, then stick the hose up inside the panel that you cant get to and blow through the hose with an air gun! he reckons it forces the rust kill/fish oil out in an explosion inside the panel killing any rust in its path! i think it is probably the best idea yet

[DannyboyDS]

etch primer generally contains acids to do exactly what it says, etch into metal.

As far as I remember it does not always have to be an epoxy, I used to make the junk.

I say go zinc rich etch primer, it should help stop future rust, then over the top with a good undercoat.