How to grind paint with sandpaper: a hot topic and practical guide on the Internet
Recently, a hot topic in the field of home DIY and car repair has focused on the "sandpaper polishing" technique. Whether you're refurbishing furniture or repairing car scratches, it's crucial to know the correct way to sand. This article will combine the hot content of the past 10 days across the Internet to provide you with structured data and detailed steps.
1. Popular topics related to sandpaper and paint on the Internet (last 10 days)
| Ranking | Topic keywords | Search volume trends | Main application scenarios |
|---|---|---|---|
| 1 | Car paint touch-up and polishing | ↑35% | Body scratch repair |
| 2 | Wood paint renovation | ↑28% | Furniture transformation |
| 3 | Sandpaper mesh selection | ↑42% | general technology |
| 4 | Water-based paint sanding tips | ↑19% | Environmentally friendly painting |
2. Standard operating procedures for sandpaper grinding and painting
1. Tool preparation stage
•Sandpaper selection:Select the mesh number according to the condition of the paint surface (see the table below for recommended gradients)
•Auxiliary tools:Sanding block, spray bottle, vacuum cleaner, protective mask
| Paint surface problem | Initial sandpaper mesh | Fine grinding mesh |
|---|---|---|
| Severe bumps | 180-240 mesh | 400-600 mesh |
| minor scratches | 400 mesh | 800-1000 mesh |
| final polish | 1000 mesh | 2000-3000 mesh |
2. Detailed explanation of practical steps
(1)Surface cleaning:Remove paint dirt with degreaser
(2)Coarse grinding:Sand at a constant speed along the grain direction, maintaining an included angle of 60°
(3)Water grinding skills:For water-based paint, use a spray bottle to wet the surface
(4)Mesh number transition:Before each increase in mesh number, the front wear marks must be completely removed.
3. Answers to recent hot questions
Q1: Why is “wet and dry” sandpaper popular on Douyin?
A: According to laboratory test data, wet sanding can reduce dust and extend the life of sandpaper, but dry sanding is more efficient. The specific choice depends on the operating environment.
| Comparative item | Dry grinding | Wet grinding |
|---|---|---|
| efficiency | 30% higher | lower |
| Dust amount | 100% | 80% reduction |
| Sandpaper loss | faster | Extended 2 times |
Q2: Is the "cross polishing method" recommended by the UP owner of Station B reliable?
A: This method is suitable for flat areas, and one-way lines can be avoided by 45° cross-grinding. However, the curved surface parts still need to follow the original curvature.
4. Latest Industry Trends
1. Tmall data shows that sales of sandpaper in May increased by 57% year-on-year, with 3,000 mesh ultra-fine sandpaper growing the fastest
2. New environmental protection regulations require: Aluminum-containing oxide sandpaper will be gradually phased out from 2024, and silicon carbide materials will become the mainstream.
3. Internet celebrity product warning: The actual mesh number of "nano sandpaper" recommended in some short videos is seriously false.
5. Expert advice
• Car paint: It is recommended to use a DA polishing machine with sandpaper
• Wood paint surface: Check the sandpaper loss every 2 square meters sanded.
• Safety Tips: Microparticles generated by sanding require N95 level protection
Through the above structured data and practical guide, you can systematically master the sandpaper polishing technology. Remember the key points: change the mesh number step by step, maintain uniform force, and clean up the grinding debris in a timely manner to achieve professional-grade polishing results.
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