Painting blasted wheels

[crombie1]

I have just had my 182 wheels blasted. What's the next step before painting as they are very rough feeling after the blasting. Do they need sanded ? And what primer do I use ?

 

[easym5]

Hi i did a set a couple of months ago,if you put a few layers of primer down then sand em down they will be nice and smooth for top coat and laquer
I just used the grey primer from halfords did the job fine

 

[crombie1]

Iv done a few coats of high build primer but you can still see the blasting marks

 

[Knuckles]

Sand that down, apply a few more layers, sand that down and it should be smooth. If not, repeat untill the marks are gone

 

[Jaff.]

Was told by a local wheel paint man that blasting permenently damages wheels ndvare really only able to be powder coated afterwards.

Obviously this depends on the grade of shot used but it sounds like your wheels have had quite a wavy shot used and so they have quite deep pitting. High build primer and some patience is all I can suggest

 

[graham27]

Halfords aerosols aren't very high build, you can get Upol high 5 in Halfords which although is more expensive it'll fill far deeper marks and save you in the long run

 

[crombie1]

I thought sanding would be the answer. It would of been less work not blasting them

 

[crombie1]

It's upol and a gun I'm using

 

[graham27]

Assumed it was aerosols you were using, must be really deep marks if 2k high build primer isn't filling them!

 

[crombie1]

I'll try get pics tomorro. So far I did 2 coats of etch and 1 coat of high build. Now I'm sanding

 

[JCC]

Don't bother sanding 1 coat of high build. Get 3 good coats on it then sand. No need to sand in between. If it's proper UPOL high build stuff out a tin you're using they should be fine after that, although it's hard to say without seeing them up close.

There's no need for more than one coat of etch either, for future reference.

 

[crombie1]

I did wonder about the etch as Iv never used it before

 

[crombie1]

What should the primer be mixed with and at what ratio ?

 

[marksman]

the 2k primer we use at work is 7:1:1 primer , hardener , thinner ..

 

[JCC]

If it's the same UPOL high build stuff we use at work it's meant to be mixed 4:1 with appropriate hardener, we use UPOL's stuff to go with it. You can throw in 5% thinner if you find it too thick, again we use UPOL's stuff for that.

 

[rich-6]

Id have probrably 80 gritted them then finished in 180 before high building them, it all depends what media was used to blast them with as to how much prep is needed