Dcal
Member
- Messages
- 3,848
- Location
- Antrim Northern Ireland
I'm doing a bit of work on the better half's car and am overhauling the front calipers, among other things.
They are toast and I was just going to fit new seals and pistons .
I ordered the bits from "Bigg Red" and they came the next day as normal. (Yes to NI)
Unfortunately I ordered the wrong bits (57mm dia pistons as opposed to 54) so rang them up and they are sending the correct ones out, so fantastic service as always.
Anyway I was looking at the rusty mess and thought, if I prep and paint the bits it would be an opportunity to see how the paint lasts.
I then thought why not try different level of prep to see if better prep lasts longer.
Now the car could go bang tomorrow and it will tell me nothing, but if it keeps running I should be able to check the paint every time I put a set of pads on it.
If (when) it does go bang, I can take the calipers off and throw them in the hedge to see how they develop.
So the plan is to just needle the hub carriers, needle gun then Bristle Blast the DS caliper and the PS slide and grit blast the PS caliper and DS slide.
All will then be given the same coating - 2 coats of Jotun 90 and a 2K top coat.
Caliper as it came off the car.
One caliper blasted and the other needle gunned
One slide blasted the other needle gunned.
DS caliper and PS slide, needle gunned and Bristle Blasted using my home made surface prep tool.
The surface prep tool is too big to get in all the corners but that's part of the test.
And fianally a hub carrier just needle gunned.
The blasting is brilliant at getting into all the nooks and crannies but I'm using very "used" J Blast so it's mostly dust and too fine for the "correct" surface profile for but that's a good test too.
So I should be testing sa2.5 (blasting to near white metal) against ST3 (very thorough mechanical prep) and ST2 (thorough mechanical prep)
Should get some paint on tomorrow.
I will probably have to freshen up the prep but it's far too late to start into it tonight.
They are toast and I was just going to fit new seals and pistons .
I ordered the bits from "Bigg Red" and they came the next day as normal. (Yes to NI)
Unfortunately I ordered the wrong bits (57mm dia pistons as opposed to 54) so rang them up and they are sending the correct ones out, so fantastic service as always.
Anyway I was looking at the rusty mess and thought, if I prep and paint the bits it would be an opportunity to see how the paint lasts.
I then thought why not try different level of prep to see if better prep lasts longer.
Now the car could go bang tomorrow and it will tell me nothing, but if it keeps running I should be able to check the paint every time I put a set of pads on it.
If (when) it does go bang, I can take the calipers off and throw them in the hedge to see how they develop.
So the plan is to just needle the hub carriers, needle gun then Bristle Blast the DS caliper and the PS slide and grit blast the PS caliper and DS slide.
All will then be given the same coating - 2 coats of Jotun 90 and a 2K top coat.
Caliper as it came off the car.
One caliper blasted and the other needle gunned
One slide blasted the other needle gunned.
DS caliper and PS slide, needle gunned and Bristle Blasted using my home made surface prep tool.
The surface prep tool is too big to get in all the corners but that's part of the test.
And fianally a hub carrier just needle gunned.
The blasting is brilliant at getting into all the nooks and crannies but I'm using very "used" J Blast so it's mostly dust and too fine for the "correct" surface profile for but that's a good test too.
So I should be testing sa2.5 (blasting to near white metal) against ST3 (very thorough mechanical prep) and ST2 (thorough mechanical prep)
Should get some paint on tomorrow.
I will probably have to freshen up the prep but it's far too late to start into it tonight.