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Here in the UK it is called knifing putty. Once car bodywork has been filled and sprayed with primer, small blemishes show up in the paint. Scratches from sanding etc. Too small for body filler, so knifing filler, or "spot putty" is used. My tube instructions say to allow 30 mins between layers...

When printing alignment holes for pins in patterns, with PLA I allow an extra dia of .3mm to .4mm for a 4mm or 6mm hole. With resin, it's .1mm. The visible layer lines are very easy to remove or sand. Resin prints also take filler or paint OK too. I have only used water washable resin. Even with...

The method for smoothing a surface that works for me is this. Scrape the high points down. I have a PLA that responds very well to scraping, others might not. Spray the surface with automotive primer/filler. One coat. Sand the paint to only leave paint in the low spots. Spray another coat. Sand...

Thanks for the heads up about white filament Stan, I didn't know that. I am using Copymaster 3D premium filament at the moment. It scapes and sands to perfection. It's made in Europe, so it might not be available in the US. Try copymaster3D.com

I don't know if this will help. People who race Austin Seven powered cars often "bell" the big end bearings to allow for the whip in an A7 crankshaft, which only has main bearings at each end. At high revs the crank can develop quite a whip. Because the two middle pistons will then be thrown up...

For scaping I use cheap stainless steel "dentist" tools. They will take an edge for a while. I also use a metal nail file. The curved end, for getting gunk from under what's left of your nails, is also good for curved surfaces. I would be interested to hear of your experience with the body...

I found it easier and quicker to scape the surface of my pLA prints, then a light sanding, then a few coats of primer/filler, another light sanding, then fill any imperfections. Some PLA sands better than others. The primer/filler dries in a few hours. To keep my resin printer warm, very warm...

You got me worried there for a moment. Luckily I have a small flywheel to hand that has curved spokes, so I could check it. The spokes do curve differently. And just to correct a glaring error in your staement, you can never look at flywheel patterns for too long. Never.

I am looking forward to the finished flywheel, especially seeing how well four locating holes match up. When I printed my flywheel patterns, I used two holes. One circular hole in the middle, and one slot in the rim that lined up with the middle hole. The slot was the same width as the circular...

I look forward to seeing what you can do with the machine. It might be out of reach for a hobbiest like me, but, it's still interesting. Knowing that the Ender wouldn't produce accurate holes (it could be me of course) if I had two pins holding a pattern together, one half of the pattern would...

That looks a tad better built than my Ender3. I would like to see a side by side print test between the two machines. When I print something on the Ender, I know I will have hours of surface prep ahead of me, and if I want say, a 6mm hole in the part, I size the hole at 6.4mm in cad. How would...

To cut down on the spark jumping all over the place in an Austin Seven distributor cap, we would spray the inside with WD40. It could be worth a try.

Still clearing weeds from the flower beds. Most of them just pull out, but I still have to dig the soil to get rid of as much weed growth as I can. Today I pulled a weed out that was over three feet tall. It has many friends!

Always have, always will.👍

That poses an interesting question Mr Twin. When does an engine become a model? Is a small engine made a fraction smaller than the original, not classed as a model? I am reminded of a sketch by the Monty Python team, something along the lines of Tom Browns schooldays, when Tomkinson, in the...

The last time I messed about with electronics was pre 1968. I remember buying valves, tubes, for something, and transisters, resistors etc for other projects. I sometimes think I should have stuck with electronics rather than become a carpenter.

Sorry to hear of your troubles Byron, your's make mine seem insignificant. Take care. I don't think the inventors of todays computer guided missiles and war machines taught Asimov's law to their creations.

I thought I had posted pictures of my car here before, I can't find any such post, so I will post these new pictures. I am making four, one tenth scale models of my vintage car. One for me and one for each of my sisters. I started many months ago and didn't tell them what I was doing. The cars...

What a lovely little engine! A good runner too.

That sounds good! Nicely done. Edited: It looks good too!