Etch Primer v Epoxy Mastic 421 (HELP AND ADVICE)

[vw1]

Ok I have been using epoxy mastic 121 chassis paint from rustbusters.co.uk. I bare metal before I use and spray epoxy 121 on chassis parts. But for body work rustbusters site state epoxy 421 for again bare metal on long resto jobs etc. But I see that some people use etch prime have I made a cock up by using epoxy 421 ??

What grade paper should I use to key the metal before I apply epoxy 421 to the body work ? for the chassis I used the a course grit paper .

Thank you for any advice ..

 

[langy]

I can only speak for 2k Epoxy but its a much newer and better product than etch in my opinion, I use 120 to key bare steel

 

[vw1]

Thank you Langy ..

 

[vw1]

This is the epoxy on body work I have brought ..

 

[langy]

I only tried the other epoxys once and found they don't go on anywhere near as smooth as the Lechlar epoxy.

 

[ajlelectronics]

I think that is a rebrand of Jotun Epoxy primer. Agree with Steve though, Lechlar seems to be the best for minimising the after work.

 

[MG David]

Depending on how much you need Lechlar epoxy primer from Paint4u.com will be no more expensive. I say how much you need because they sell the harder in a minimum 1L which is enough for 2L of the paint or 3.3L of full mix. So if you only bought 1L of paint you would be wasting half of the hardener.

 

[zx9]

Depending on how much you need Lechlar epoxy primer from Paint4u.com will be no more expensive. I say how much you need because they sell the harder in a minimum 1L which is enough for 2L of the paint or 3.3L of full mix. So if you only bought 1L of paint you would be wasting half of the hardener.

The hardner will keep for a while, a couple of years at least.

 

[langy]

Depending on how much you need Lechlar epoxy primer from Paint4u.com will be no more expensive. I say how much you need because they sell the harder in a minimum 1L which is enough for 2L of the paint or 3.3L of full mix. So if you only bought 1L of paint you would be wasting half of the hardener.

The hardener lasts pretty well

 

[vw1]

This is the epoxy on body work I have brought ..

I brought this brand as its it iso free ...

 

[zx9]

I brought this brand as its it iso free ...

Epoxy primer is iso free, the hardner is different to 2K hardner.