Simply SP-037 Spray Putty 400ml – Fast Drying – Great Adhesion – Corrosion Preventive – Multiple Application, Aluminium

I will review this in a long form and a short form with an emphasis on using it for 3D prints. Long form: I used this for a recent project and it worked really well. Following hours of sanding the main print, I washed the model clean, dried it and applied a few coats of this (approximately two hours between each coat), left it overnight and sanded it down with a fine grit, leaving a very smooth texture akin to running your finger over a bar of chocolate. It easily filled any irregularities left after sanding (don’t be alarmed if any lines you missed are visually “enhanced”, that just shows you exactly where to carefully sand the filler) and, applied generously enough, would mean you’d find a smooth layer underneath. Only gripe was that it came off a bit more than expected when trying a wet sand but that may very well have been user error, keep this in mind and consider dry sanding followed by a quick wash to clean off any residuals. Please remember to wear goggles, a decent respirator mask and disposable gloves throughout this process. Short form: Good bit of kit, simply get your PPE on, give the can a good shake and spray your chosen target while outdoors if possible. Allow it to dry (indoors should be fine provided it’s in a ventilated room), come back in two hours to check on it, repeat as necessary, sand as necessary, apply another coat all over or on problem areas if required.

This stuff is incredible. I can't believe I'm only finding this now. I've used 3 cans re doing all my props. This hides layer lines so effectively. So much better than filler primer, even high build stuff. Reading more into this its actually an acrylic resin in a can. Drys fast, can be sanded to a mirror finish for paint (but not really needed). Great stuff! Ordering more as we speak. 2 Coats of this will hide layer lines from a raw 3d print. (A little sanding is needed for really bad lines)

It is good and it was value for money, not now though, I bought loads of these over the years, they were always around the £5 a can mark, I don't understand why they've almost doubled in price the last few months, rip off

I bought this to fill the gaps and hide the worst of the layer lines in 3D prints. Well, this stuff is amazing! It does this perfectly. It dries really quickly, so you can apply, sand and re-apply quickly. I completed a model in an hour this morning and gave it 3 good coats. I also really love the colour. My most recent project was a copy of the head of the horse of Selene (in the picture) This needed a lot of filling and several coats of this spray as well as lots of sanding. I think this colour really looks like stone when it is dry. It dries really matt. For this model, I then waxed it with some beeswax to make it look weathered/older. It also really accepts paint well when dry. There's loads in a can and with 2 cans I've done 4 largeish 3D prints. I highly recommend this stuff!

Give a good 24 hour before doing any work over the top,,if you don't deal it it can cause paint shrinkage...

I purchased this to fill in layer lines and smooth out 3d prints on things I wanted to paint. It works very well. I have never found a primer that can properly fill the layers as well as I wanted but this does the job perfectly. I've tested various methods of sanding using different types of paper and grits. I found that best process is several light coats of the putty, 30 minutes between coats (it's actually touch dry in under 10 minutes with thin coats) and then overnight after the final one to let it totally set. I then use wet sanding with 400 grit sandpaper - careful here it makes for a very messy worksurface and hands, use gloves - leaving about 1 hour to fully dry again and then finished it off with dry sanding (do this outside and with a mask if you have one, particles go everywhere) using 1000 grit sandpaper. Things are unbelievably smooth at this point. After that use primer and then paint, should come out awesome :) I have spray painted directly onto it WITHOUT primer as well and it worked just fine however I still suggest you prime it just to seal the putty layer against any moisture (which if the wet sanding is anything to go by it won't stand up against being wet for too long without a sealing coat of something). No clue how this works with cars haha

Great use for 3D prints and filling in the gaps. Like others I struggled to find a decent filler that filled in the gaps or was easy to work with. I brought 2 for my current design and they did the trick. I did a few thin layers until the gaps were covered, leaved for a 3/4 hrs to dry when done. I used a primer and finishing spray afterwards. It leaves a grit like texture afterwards but is aesthetically pleasing. In general the process of filling in small gaps was best so far but would still use filler for larger holes/gaps.

I was a bit sceptical looking at the previous comments on this stuff but for the price gave it a go, this stuff is great I normally use Motip Spray putty but that's getting quite expensive now. Once opened and given a good shake the spray was great, sticks really well and dries quite quick, yes it smells but not as bad as others I have tried. Once dried it's easy to sand and you can paint straight away. Love it and now it's my go to for spray putty.