Sand blasting va dremel sanding

stranger12

Hi guys,


I have been sand blasting my caliper fornalmost 4 hours to get it to bare metal.

I am knakerd and full of sand and spend loads of money

Bought paving sand at £6 a bag and then bought a specialised sand at £11 for 7kg which was no better than the sand purchased earlier

What is worse is my ears are buzzing

But result is great and just done the first prime coat

My question is for the other caliper, would you use dremel and sand paper disc to clean it ? Grit 100?

How would i get to hard to reach areas? Is there such a thing as flexibale disc?


I also looked at pait removers but i doubt they will be able to remove rust and few layers of paint.
I looked at few brands and all of them had bad reviews on how crap they are and how they can't remove any paint.

angrycrow

When I need to sand irregular shapes with a dremel I take about 3 of circular sanding discs and put them onto the spindle together facing out. The extra layers make it a little stuffed as as the top layer wears away the one under takes over.

Not sure I would want to do a whole caliper with a dremel though. Media blasting sounds more effective.

Norman_Castle

Four hours to clean a caliper! Your sand blaster is crap. Try paint stripper to remove most of the paint then sand blasting. How much would a local company charge to clean two calipers?

Unlike hearing aids, ear protection is very cheap.

Nodding_Donkey

Use grit, it will take about 10 mins per caliper.

stranger12

Are you serious re grit? Is it not too hard?

Would this be referred to as sharp sand in shops?

Or is it the salted grit used on slippery road

wgl2014

Up to your last comment I wasn't sure if you were taking the mick but that is just too stupid to be genuine.

Jackmydad

http://www.hse.gov.uk/pubns/guidance/cn7.pdf

Notice the caution there "Do not use sand"

I'm not an expert, but I found lots of stuff online about not using sand when I was looking for media for my own small blasting gun a while back.

Better safe than sorry!

stranger12

What did you use then?

facade

Media blasting is old hat now, what you want is a laser.

Youtube search laser derusting

Here is one

https://www.youtube.com/watch?v=ACGSzBXKONo

Top of my Christmas list for Santa.

OP, if you get one, can I borrow it please?

droopsnoot

ETA - noticed your other thread that suggests it might be an aluminium caliper, so removed the stuff about acid dipping and electrolytic cleaning, not sure either work with that.

Would it be much dearer to just send it to somewhere like Bigg Red and get them to do it all?

The biggest problem with modern paint stripper is that the active ingredient is present in much lower quantities than it used to be, so if you had an old tin of something like Nitromors that's been on your shelf for 15-odd years, it'd probably be great. You can buy the active ingredient on eBay and add it back into the modern strippers to boost the strength - I won't say what it is (not least because I might spell it wrongly, and with chemicals you don't want to mix up your 'ides' and your 'ates') but a quick search will find it. Or you could look out some paint stripper by "Starchem" who I believe still do proper strength stuff.


The other problem with using paint stripper is that the paint used on brake calipers is very hard stuff, partly because it has to be in order to survive the high temperatures a brake caliper reaches, and partly because it's been baked and baked by those high temperatures.

stranger12

This is what I found out re new paint stripper due to eu regulation
It isn't cheap to pay £20 for a liter paint stripper that is useless so what would you use?


I still want to know if the comment re grit is real desite the sarcastic commebt