help understanding paint types!

[pants007]

rustbullet! urethane primer?

Hi! Im new here, but have been reading posts for weeks now so thought i would join as i have some questions.

I will be spraying my 1972 mg midget soon after shotblasting, and am going to spray the hole car with 2 coats of Rustbullet (anyone used it)? Anyway rustbullet say if the car is going to be left a while before the colour and clear are applied it should be primed with urethane primer as its easier to sand etc.

1) What is urethane primer? cant see it anywhere!

2) I'll be spraying at home so dont want to go down the 2k path, so what are my options?

anything that goes over the rusbullet has to be compatable with aluminium i think as it has a high metal content and self levels.

any help would be great as i really dont have a clue!

friends of mine in oz sware by 1k acrylic primer, base and clear?

 

[steveo3002]

honestly if you are having it blasted just use a good epoxy primer , you can get non iso ones, or maybe the blasting place can spray it

ive tried rust bullet ..not really that impressed , just clean the steel up mint and use a good epoxy , then you know if wont cause issues further down the line

 

[pants007]

laughinghi i have already bought the the rustbullet so am defo going down that path, i suppose there will always be people far and against a product!

is epoxy the same as urethane? any primer has to be compatable on top of polyurethane?

thanks for your input!

 

[Weldinator]

Rust bullet goes very hard to if there is any movement on the area it may crack. On clean steel ive been advised to key the steel very well, it needs a surface much like surface rust.

Polyurethane absorbs moisture like a sponge dont it ?

 

[langy]

laughinghi i have already bought the the rustbullet so am defo going down that path, i suppose there will always be people far and against a product!

is epoxy the same as urethane? any primer has to be compatable on top of polyurethane?

thanks for your input!

As Steve said Epoxy primer is the way, rustbullet would be wasting your time, all depends if you want to do the job properly or not.
I would say that when they mentioned polyurethane they meant 2 pack

 

[langy]

Rust bullet goes very hard to if there is any movement on the area it may crack. On clean steel ive been advised to key the steel very well, it needs a surface much like surface rust.

Polyurethane absorbs moisture like a sponge dont it ?

Nope thats Polyester spray filler.

 

[steveo3002]

id suggest you sell the rust bullet and do it right first time , blasted steel doesnt need any "miricle paint "

ive tried rust bullet , por 15 and all the rust fixing paints over the years , none of it works as claimed

just consider the hassle of stripping your finished car and starting again because something didnt agree with the rust bullet

choose a brand that fits your budget and stick with it

 

[Weldinator]

Nope thats Polyester spray filler.

I stand corrected, thanks.

As said, sell the rust bullet which imo is a bit too expensive anyway. I use it in places i cant reach to rid the rust easily myself. Some other people i know have used it and has lasted over a year.

Budgets does decide on the best way they can afford to do the job the best they can.

Does anyone know where to buy a face mask that has a breathable oxygen bottle that goes on your back, for doing 2k paint ? HSS rent price is far too expensive tbh.

 

[pants007]

i should have said my car has been blasted but waiting to paint! so has already got surface rust coming through as that was the best surface for rustbullet! im going to bite the bullet and continue with the rustbullet! maybe i should e-mail them for options?
So is there any where i can buy urethane high build paint in the uk? or is it just synthetic i need?
i did want to use 1k acrylic base and clear but cant seem to find that either!
thanks for your help guys!

 

[steveo3002]

well its madness painting over rust in my opinion

but yeah if thats what youve decided on best ask them for specific brands/products that work with it , then you know who to blame when it goes wrong

 

[the snooper]

i should have said my car has been blasted but waiting to paint! so has already got surface rust coming through as that was the best surface for rustbullet!

so what you are saying above is you wanted to use rustbullet so you let it rust in order to do so, if ive read that correctly then to put it bluntly then it was a very stupid thing to do and very naive of you to think its a better way to paint a car.

non of these so called rust treatments are a cure for rust if they were the cars would be painted with it in the first place and we would have rust free cars on the roads.

your on the road to more work later on and spending more cash

 

[pants007]

you cant get every bit of rust off when you put epoxy primer on so rust will always be there! i was planning to use fast etch by eastwood first, or wire wheel first! its only very light surface rust so would prob just brush off! i have alot of new panels which are covered in that black factory stuff! (i assume that says on). I couldn't put a coat of paint on after sand blasting as i had/have so much welding to do that hardly any of the car would have been covered! yeah your prob right it is madness, in a perfect world id have a garage do it but so would everyone!

thanks for your comments guys!

 

[kelsham]

I used Rust Bullet on the rear springs of my XJS. One year on and rust was showing through.

It also had a tendency to bubble if applied too thickly. I ordered it twice before realising it was overhyped.

Strangely the second tin was much thicker in consistency than the first tin?

I went back to Jenolite, and thoroughly cleaning off all visible rust with Polycarbide wheels and wire brushes.

I find a good application leaves a phosphate layer that should be overpainted as soon as possible to secure it's integrity.

Jenolite has been available since I started tinkering in the early 1960s.

Regards Kels

 

[the snooper]

you would have been way better off to prime and give a light coat of celly paint straight after the blast to stop the rust forming and just grind back off when need to to weld then treat again after welding especially if the car is outside.
as you dont have a garage i can see its a big struggle for you

good luck with it i hope it turns out ok for you
would be good to see some pics of it and your progress

 

[steveo3002]

so now youre saying etch it before the rust bullet ?

 

[pants007]

i dont know what im saying thats why im on here!lol your slowly changing my mind!

 

[pants007]

oh my car is inside a heated garage! when i said 'garage do it' i meant body shop!

 

[the snooper]

i think you are slightly in the smelly stuff
you started out spot on, got it blasted but it went down hill from there.
it should have been protected with paint and repainted as the welding progressed and you would have had it easy

 

[the snooper]

oh my car is inside a heated garage! when i said 'garage do it' i meant body shop!

oh yeah i mis-read it aswell

 

[pants007]

oops! i know that really! its done now!