R0 90 for stripping paint?

[noob]

I recently picked up an RO 90; easily justifying it's cost against the $1400 quote I got for prepping and painting the exterior trim on my house. I figured I'll do it myself; saving money and getting to keep a very cool tool after I'm done. But after reading through a bunch of threads here on the topic, my head is spinning a little bit. Opinions, tools, and techniques seem to run the gamut (i.e. maybe a RAS would have been a better tool choice, or an LS 130 with the scraper attachment)

Sooooo... here's the direction I think I'm heading in... any feedback would be very much appreciated.

Here's the condition it's in:

Since I'll be putting a new coat of paint over it, can I skip using a heat gun and just scrape the dry flakes, sand it smooth with the RO 90, and apply the fresh coat? I'm considering getting one of these to help with the scraping (as suggested in one of the threads):

Granat 80 grit in Rotex mode to smooth out the old paint? ...then a finer grit in orbital mode to prep for paint?

Thanks in advance!

 

[duburban]

so have you tried the ro90 yet?

 

[noob]

so have you tried the ro90 yet?

Yep. Just on a small section. I anticipated the large flakes would get sucked up through the hose, but that was not the case. It just sort of mushed them around until they fell off or stayed put (only slimmed down and smoother)

 

[farms100]

Big flakes like that come off with a putty knife pretty quickly. then sand it smooth to blend the edges of the good painted parts and bare wood so you dont get bumpy paint particularly on the sill where you will see it every time you look out the window.

80 might be too fine.

 

[Paul G]

There's probably folks here who deal with this stuff every day and then there's folks like me who have done it a few times, so take my input for what its worth. I'm in a hot part of California, no snow, rarely freeze. I'd scrape till nothing comes off anymore, then sand it smooth, prime and paint. Not knowing the age I'd be mindful of lead. If present I'd consider a paint stripper instead to avoid the paint sanding dust. If those are metal frames they may need a different primer if stripped down to metal. Is there glazing putty and if so is it sound? Just rattling off things I'd be thinking about.

 

[noob]

The window frames in the photo are aluminum, but they've been replaced with vinyl cased windows since the photo was taken

I'm in Southern California too, if that's a factor...

I just checked the pad I was using... it's a Granat 40. I'll report back after I've done a larger section, scraping first then the 40 grit

 

[Kev]

Don't know what you have in the US, but there are a number of products that will bond the surface where you have flaking paint and potential for further peeling - may be worth looking into that if you're not taking it back to bare timber.

(a sealer / primer maybe)

 

[panelchat]

those Bahco scrapers are superb. one of the best items ive ever bought. should do a great job getting rid of most of the paint.
next on my wishlist: a vac hookup for that scraper!

 

[noob]

Don't know what you have in the US, but there are a number of products that will bond the surface where you have flaking paint and potential for further peeling - may be worth looking into that if you're not taking it back to bare timber.

(a sealer / primer maybe)

Whether of not I need to strip everything down to bare wood is one of my concerns. I read somewhere on here that's its not necessary if the layer is stuck on there good enough to resist scrapping (?)

...and apparently the paint we have here is crap compared to what you have on your side of the pond.

Any recommendations on a paint/primer from anyone in the States?

 

[noob]

those Bahco scrapers are superb. one of the best items ive ever bought. should do a great job getting rid of most of the paint.
next on my wishlist: a vac hookup for that scraper!

[smile]

 

[JOELFMARTIN]

Try this paint  http://liquidceramic.com/  I've used it and it works great, but expensive. Give them a call and talk to them.

 

[farms100]

Try this paint  http://liquidceramic.com/  I've used it and it works great, but expensive. Give them a call and talk to them.

oh that looks very cool!

 

[bijeshj]

Since I'll be putting a new coat of paint over it, can I skip using a heat gun and just scrape the dry flakes, sand it smooth with the RO 90, and apply the fresh coat? I'm considering getting one of these to help with the scraping (as suggested in one of the threads):

Granat 80 grit in Rotex mode to smooth out the old paint? ...then a finer grit in orbital mode to prep for paint?

Thanks in advance!

I have been using this scraper last few weeks to remove poly and paint on both stained and painted areas quite successfully. Followed by sanding. I was also able to pick up replacement blades ( different brand) at the local sherwin Williams.

 

[Kev]

Try this paint  http://liquidceramic.com/  I've used it and it works great, but expensive. Give them a call and talk to them.

oh that looks very cool!

See if you can find anything like this http://www.wattyl.com.au/en/find-the-right-product/exterior/ExteriorPrimersandPreps/WattylMasterPrepSurfaceBinder.html

Paint in Oz can be had for ~$10 for 4 litres right up to $120+ for 4 litres (gallon) and varies tremendously. A friend I went to school with joined Wattyl Paints over 30 years ago and is now one of their chief chemists. Wattyl is one of Australia's best paint brands.

Obviously I don't know anything about the Liquid Ceramic paint ...

 

[noob]

The Liquid Ceramic sounds great. But I was hoping for something less expensive, like maybe Behr Ultra paint+primer-in-one or possibly Benjamin Moore Aura? Although... the Liquid Ceramic statements about solid content makes a good point...

 

[noob]

Oh... also, I'm planning on painting the trim in a flat or satin sheen. We don't get much rain here and I think it will look cool. All our interior walls are flat/matte except the bathrooms (which are eggshell)

 

[campbellcraft]

You might want to check Consumer Reports on paints. They rate a good number of them and often found the most expensive wasn't the best. As a home owner I used my RO 90 with 40 then 80 after scraping. Size and weight while working on a ladder where wonderful.

 

[noob]

You might want to check Consumer Reports on paints. They rate a good number of them and often found the most expensive wasn't the best. As a home owner I used my RO 90 with 40 then 80 after scraping. Size and weight while working on a ladder where wonderful.

Thanks! Yeah, I stumbled on a Consumer Reports article earlier today. The Behr Ultra ranked really high (above Benjamin Moore). Nice surprise!

 

[duburban]

its really hard for me to put any faith in those tests. the scope of the testing must be .... a month, two months?

 

[John Stevens]

I've only done interior paint, but it was 3-4 coats of oil- and latex-based paint down to bare wood.  Granat 40 grit in rotary mode will chew through it quickly.  Why not give it a try, and if it's not fast enough for you, then try something else?

Regards,

John